Polypeptides comprising IL-6 ligand-binding receptor domains

ABSTRACT

The present invention provides, among other things, a polypeptide, and a pharmaceutically acceptable salt. thereof, that inhibits the binding of IL-6 ligand with IL-6 receptor under physiological conditions, a nucleic acid that encodes such a polypeptide and can be expressed in a cell, a nucleic acid that comprises or encodes an antisense nucleic acid molecule or a ribozyme that is specific for such a polypeptide, an antibody that is specific to such a polypeptide, an anti-antibody thereto, a composition comprising such a polypeptide, nucleic acid, antibody or an anti-body and a carrier therefor, a composition comprising a solid support matrix to which is attached an above-described polypeptide or an anti-antibody to a specified polypeptide sequence, a method of prophylactically or therapeutically inhibiting IL-6 signaling in a mammal in need thereof, a mammal in need thereof, and a method of removing IL-6 ligand from a bodily fluid of an animal.

This is a continuation of International application No. PCT/US00/23490, filed Aug. 25, 2000, which designates the U.S., and which claims priority to U.S. Provisional Patent Application No. 60/151,277, filed Aug. 27, 1999, both of which are incorporated by reference.

TECHNICAL FIELD OF THE INVENTION

The present invention relates to polypeptides comprising IL-6 ligand-binding receptor domains, nucleic acids encoding such polypeptides, antibodies, compositions comprising such polypeptides, nucleic acids, or antibodies, and methods of use.

BACKGROUND OF THE INVENTION

Interleukin-6 (IL-6) is a cytokine that is produced in response to various stimulators and is responsible for a variety of biological activities, including the stimulation of B- and T-cell growth and differentiation (Muraguchi et al., J. Exp. Med. 167: 332 (1988)), production of acute-phase proteins in response to inflammation or tissue injury (Gauldie et al., PNAS USA 84: 7251 (1987); Geiger et al., Eur. J. Immunol. 18: 717 (1988)), multilineage hematopoiesis, osteoclast formation, maturation of megakaryocytes, and platelet production. These biological activities are initiated when IL-6 binds to the extracellular portion of the interleukin-6 receptor, which is variously referred to as the interleukin-6α subunit (IL-6Rα) or B-cell stimulating factor receptor (BSF-2 receptor). When IL-6 binds to IL-6Rα, a complex is formed. The complex then binds to the extracellular portion of the interleukin-6 receptor known as gp130, which is also referred to as the interleukin-6β subunit (IL-6Rβ). The resulting complex then transmits the IL-6 signal intracellularly.

The precursor of the IL-6 receptor reportedly comprises 468 amino acids (Yamasaki et al., Science 241: 825-828 (1988)). The mature IL-6 receptor reportedly comprises 449 amino acids (Yamasaki et al. (1988), supra).

Abnormal expression of IL-6 has been implicated in the pathogenesis of a variety of diseases, including multiple myeloma, plasmacytoma, hematological diseases such as plasma cell dyscrasias, leukemia and lymphoma (including non-Hodgkins's lymphoma and Lennert's T-cell lymphoma (Kishimoto, Blood 74: 1 (1989)), mesangial proliferative glomerulonephritis, polyclonal B-cell activation conditions, allergic diseases (Type I-IV), rheumatoid arthritis (Hirano et al., Eur. J. Immunol. 18: 1797 (1988)), diabetes, multiple sclerosis, SLE, septic shock, bacterial infection, viral infection, post-menopausal osteoporosis, chronic immune deficiency and autoimmune diseases (Med. Immunol. 15: 195-201 (1988)), including organ-specific and systemic diseases and AIDS, inflammatory diseases, and Cattleman's disease. In addition, IL-6 production has been associated with cardiac myxoma and cervical cancer (Kishimoto et al., Ann. Rev. Immunol. 6: 485 (1988)) in vivo and myelomas, histiocytomas and promyelocytic leukemia (Taga et al., J. Exp. Med. 166: 967 (1987)) in vitro. Attempts to abrogate the effects of abnormal expression of IL-6 can be made at its site of production or at its target.

In view of the above, there remains a need for materials and methods for identifying and designing agents that inhibit IL-signaling and for treating diseases involving IL-6 signaling prophylactically and therapeutically. It is an object of the present invention to provide such materials and methods. This and other objects and advantages, as well as additional inventive features, will become apparent from the detailed description provided herein.

BRIEF SUMMARY OF THE INVENTION

The present invention provides, among other things, a polypeptide, and a pharmaceutically acceptable salt thereof, that inhibits the binding of IL-6 ligand with IL-6 receptor under physiological conditions. In one embodiment, the polypeptide has the formula R¹R*R*L*L*L*R*R², and pharmaceutically acceptable salts thereof, in which R¹ is hydrogen, R³C(O)— or R³, and does not comprise an amino acid residue sequence that is identical to an amino acid residue sequence of the α-chain of the IL-6 receptor and is not linked to the moiety —R*R*L*L*L*R* via a glycinyl residue or via a proprionyl residue, R² is hydrogen, a polypeptide of from 1 to about 100 amino acid residues, NHR³ or R³, and R³ is a pharmaceutically acceptable substituent group.

In another embodiment, the polypeptide has the formula R¹⁰R¹¹XVL^(*2)L^(*2)VR¹², in which R¹⁰ and R¹², independently, are pharmaceutically acceptable substituents, R¹¹ is a naturally-occurring or synthetic amino acid residue that has an acidic or neutral side-chain under physiological conditions, X is any naturally-occurring or synthetic amino acid residue, and L*² is leucinyl or isoleucinyl.

In yet another embodiment, the polypeptide has the formula R²⁰R²¹L*R*Y*R*A*E*R*S*R²², in which R²⁰ and R²² are pharmaceutically acceptable substituents, R²¹ is a naturally-occurring or synthetic amino acid residue that has a basic or neutral side-chain under physiological conditions, L*, Y*, E* and S* are independently any naturally-occurring or synthetic amino acid residue, R* is a naturally-occurring or synthetic amino acid residue that has a basic side-chain under physiological conditions, and A* is alaninyl, glycinyl, isoleucinyl, leucinyl, valinyl, norleucinyl, norvalinyl, sarcosinyl, β-alaninyl or α-aminoisobutyryl.

In still yet another embodiment, the polypeptide comprises at least I*A*I*V*L*R*F* but less than about 200 amino acid residues that have a sequence that is identical to an amino acid sequence of the α-chain of the IL-6 receptor, in which I*, L*, and V* are independently a naturally-occurring or synthetic amino acid residue having a side-chain consisting of a C₁-C₆ straight chain or C₁-C₆ branched alkyl moiety, R* is a naturally-occurring or synthetic amino acid residue that has a basic side-chain under physiological conditions, A* is alaninyl, glycinyl, isoleucinyl, leucinyl, valinyl, norleucinyl, norvalinyl, sarcosinyl, β-alaninyl or α-aminoisobutyryl, and F* is tyrosinyl, phenylalaninyl, tryptophanyl or α-aminoisobutyryl, with the proviso that at least four of the seven substituents of I*A*I*V*L*R*F* are selected such that I* is isoleucinyl, A* is alaninyl, V* is valinyl, L* is leucinyl, R* is argininyl, and F* is phenylalaninyl.

In a further embodiment, the polypeptide comprises up to 200 amino acid residues that are identical to an amino acid residue sequence of the β-chain of the IL-6 receptor and comprises the sequence SVIILKYNIQY (SEQ ID NO:6), TRWKSHLQNYTVNATKLTVNLTNDRYLATLTVRNLVGKSDAAVL (SEQ ID NO:7), QLPVDVQNGFIRNYTIFYRTIIGN (SEQ ID NO:8), or IVVPVCLAFLLTTLLGVLFCFNKRDLIKKHIWPNVPDPSKSHIA (SEQ ID NO:9), any one of which can comprise from one to about six conservative or neutral replacements. The polypeptide can further comprise a pharmaceutically acceptable substituent.

Also provided by the present invention is a nucleic acid that encodes an above-described polypeptide, wherein the polypeptide preferably consists of naturally-occurring amino acid residues. The nucleic acid encoding the polypeptide can be expressed in a cell. The nucleic acid encoding the polypeptide can be operably linked to a signal sequence that causes secretion of at least the polypeptide by a cell in which the nucleic acid is expressed. Alternatively, the nucleic acid comprises or encodes an antisense nucleic acid molecule or a ribozyme that is specific for a nucleotide sequence in a nucleic acid encoding the specified amino acid sequence in an above-described polypeptide.

Further provided by the present invention is a composition comprising an above-described polypeptide or nucleic acid and a carrier therefor. Another composition provided by the present invention is a composition comprising an antibody to an above-described polypeptide, an anti-antibody to an above-described polypeptide, or a solid support matrix to which is attached an above-described polypeptide or an anti-antibody to the polypeptide sequence RRLLLR (SEQ ID NO:10), RXVLLV (SEQ ID NO:11), LRYRAERS (SEQ ID NO:12), IAIVLRF (SEQ ID NO:13), SVIILKYNIQY (SEQ ID NO:6), PSIKSVIILKYNIQY (SEQ ID NO:14), or a portion of any of the following polypeptides: WTNPSIKSVIILKYNIQY (SEQ ID NO:15), KLTWTNPSIKSVIILKYNIQY (SEQ ID NO:16), TRWKSHLQNYTVNATKLTVNLTNDRYLATLTVRNLVGKSDAAVL (SEQ ID NO:7), QLPVDVQNGFIRNYTIFYRTIIGN (SEQ ID NO:8), and IVVPVCLAFLLTTLLGVLFCFNKRDLIKKHIWPNVPDPSKSHIA (SEQ ID NO:9).

Also provided by the present invention is a method of prophylactically or therapeutically inhibiting IL-6 signaling in a mammal. The method comprises administering to a mammal in need thereof an IL-6 signaling inhibiting effective amount of an above-described polypeptide, a nucleic acid encoding such a polypeptide or an antibody to such a polypeptide.

In addition, the present invention provides a method of removing IL-6 ligand from a bodily fluid of an animal. The method comprises extracorporeally contacting the bodily fluid of the animal with a solid-support matrix to which is attached an above-described polypeptide or an anti-antibody to the polypeptide sequence RRLLLR (SEQ ID NO:10), RXVLLV (SEQ ID NO:11), LRYRAERS (SEQ ID NO:12), IAIVLRF (SEQ ID NO:13), SVIILKYNIQY (SEQ ID NO:6), PSIKSVIILKYNIQY (SEQ ID NO:14), or a portion of any of the following polypeptides: WTNPSIKSVIILKYNIQY (SEQ ID NO:15), KLTWTNPSIKSVIILKYNIQY (SEQ ID NO:16), TRWKSHLQNYTVNATKLTVNLTNDRYLATLTVRNLVGKSDAAVL (SEQ ID NO:7), QLPVDVQNGFIRNYTIFYRTIIGN (SEQ ID NO:8), and IVVPVCLAFLLTTLLGVLFCFNKRDLIKKHIWPNVPDPSKSHIA (SEQ ID NO:9). Alternatively, the bodily fluid can be contacted with the polypeptide or anti-antibody in solution and then the solution can be contacted with a solid support matrix to which is attached a means to remove the polypeptide or anti-antibody to which is bound IL-6 ligand from the bodily fluid.

BRIEF DESCRIPTION OF THE DRAWING

FIGS. 1a-1 x depicts (referred to herein as FIG. 1) a listing of synthetic amino acids available (from Bachem, King of Prussia, Pa.) for incorporation into polypeptides and compounds of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention provides, among other things, a polypeptide that inhibits the binding of IL-6 ligand with IL-6 receptor under physiological conditions. The present invention is predicated in part on a detailed study of a series of synthetic polypeptides having the same or similar amino acid sequence as that of IL-6 receptor, in which the ability of each synthetic polypeptide to bind to the IL-6 ligand was measured first in a high-throughput in vitro assay, and then confirmed (for at least a subpopulation of the synthetic polypeptides of greater interest) by measuring the ability of the synthetic peptide to inhibit the growth, replication, and survival of IL-6-dependent cells grown in a cellular growth medium comprising IL-6 ligand. Those of skill in the art will recognize that the ability of any particular polypeptide to inhibit IL-6 signaling or function in vivo can be easily and rapidly determined using either the techniques employed in the examples provided below, or by using another suitable testing technique, such as the B9 cell growth and signal transduction assays known in the art (see, e.g., Halimi et al., Eur.Cytokine Netw. 6: 135-43 (1995)). The skilled artisan would expect the results of such in vitro assays to be reasonably predictive of in vivo utility.

While not intending to be bound by any particular theory, it is believed that the present inventive polypeptide, and compositions comprising the same, inhibit the ability of IL-6 ligand to bind to the soluble IL-6 receptor or the membrane-bound IL-6 receptor, by binding to unbound IL-6 ligand with sufficient affinity to interfere competitively with IL-6 signaling, IL-6-dependent cellular responses (including changes in one or more of the group consisting of cellular metabolism, cellular growth, cellular replication, and cellular survival; the term “cellular metabolism” includes the ability of the cell to affect neighboring cells by secretion of biomolecules (e.g., paracrines, or exocrines), and/or display of cell-surface biomolecules (e.g., proteins or lipids)).

In each embodiment provided herein, a letter indicates the standard amino acid designated by that letter, and a letter followed directly by an asterisk (*) preferably represents the amino acid represented by the letter (e.g., N represents asparaginyl and T represents threoninyl), or a synthetic or naturally-occurring conservative or neutral substitution therefor, unless otherwise specified. Additionally, in accordance with convention, all amino acid sequences provided herein are given from left to right, such that the first amino acid is amino-terminal and the last is carboxyl-terminal. The synthesis of polypeptides, whether synthetic (i.e., chemical) or biological, is within the skill in the art.

It is within the skill of the ordinary artisan to select synthetic and naturally-occurring amino acids that effect conservative or neutral substitutions for any particular naturally-occurring amino acids. The skilled artisan desirably will consider the context in which any particular amino acid substitution is made, in addition to considering the hydrophobicity or polarity of the side-chain, the general size of the side chain and the pK value of side-chains with acidic or basic character under physiological conditions. For example, lysine, arginine, and histidine are often suitably substituted for each other, and more often arginine and histidine. As is known in the art, this is because all three amino acids have basic side chains, whereas the pK value for the side-chains of lysine and arginine are much closer to each other (about 10 and 12) than to histidine (about 6). Similarly, glycine, alanine, valine, leucine, and isoleucine are often suitably substituted for each other, with the proviso that glycine is frequently not suitably substituted for the other members of the group. This is because each of these amino acids are relatively hydrophobic when incorporated into a polypeptide, but glycine's lack of an α-carbon allows the phi and psi angles of rotation (around the α-carbon) so much conformational freedom that glycinyl residues can trigger changes in conformation or secondary structure that do not often occur when the other amino acids are substituted for each other. Other groups of amino acids frequently suitably substituted for each other include, but are not limited to, the group consisting of glutamic and aspartic acids; the group consisting of phenylalanine, tyrosine and tryptophan; and the group consisting of serine, threonine and, optionally, tyrosine. Additionally, the skilled artisan can readily group synthetic amino acids with naturally-occurring amino acids.

In the context of the present invention, a polypeptide is “substantially identical” to another polypeptide if it comprises at least about 80% identical amino acids. Desirably, at least about 50% of the non-identical amino acids are conservative or neutral substitutions. Also, desirably, the polypeptides do not differ in length (i.e., due to deletion mutations) by more than about 10%.

In a first embodiment, the present invention provides a polypeptide of the formula R¹R*R*L*L*L*R*R² (domain I), and pharmaceutically acceptable salts thereof. In this embodiment, R¹ is selected from the group consisting of hydrogen, R³C(O)—, and R³. However, R¹ does not comprise an amino acid residue sequence that is identical to an amino acid residue sequence of the α-chain of the IL-6 receptor and is not linked to the moiety —R*R*L*L*L*R* via a glycinyl residue or a proprionyl residue. Preferably, R¹ is not linked to the moiety —R*R*L*L*L*R* via either a glycinyl, proprionyl, butyryl, or alaninyl residue, and, more preferably, R¹ does not comprise an amino acid residue sequence that is greater than 50% identical to the amino acid residue sequence RWAGM— at the site of linkage to the moiety —R*R*L*L*L*R*.

R* is independently selected from the group consisting of argininyl, naturally-occurring argininyl equivalents, and synthetic argininyl equivalents.

L* is independently selected from the group consisting of leucinyl, naturally-occurring leucinyl equivalents, and synthetic leucinyl equivalents.

R² is selected from the group consisting of hydrogen, a polypeptide of from 1 to about 100 amino acid residues, —NHR³,and R³

The substituent R³ is a pharmaceutically acceptable group. R³ is independently selected with respect to size or length and secondary structure so that the present inventive polypeptide is able to bind to the IL-6 ligand with sufficient affinity to interfere competitively with IL-6 signaling under physiological conditions.

An amino acid residue equivalent thereof comprises a primary amine linked by one to three, preferably two, and more preferably one, methylenyl group(s) linked to a carboxylic acid, i.e., NH₂—(CHR^(a))₁₋₃—COO⁻, preferably NH₂—(CHR^(a))₂—COO⁻ and more preferably NH₂—(CHR^(a))—COO⁻. An amino residue (or its equivalent) is linked via a peptide bond (—C(O)NH—) to another amino acid residue (or its equivalent) or a polypeptide. An amino acid residue equivalent is an amino acid residue in which R^(a) is selected to have the same charge under physiological conditions as the amino acid residue, and, preferably, is selected to have a similar number of atoms as the side-chain substituent of the amino acid residue, i.e., plus or minus 50%, preferably plus or minus 20%. All amino acid residue equivalents preferably have only one R^(a) moiety that is not hydrogen (except for glycinyl equivalents for which Ra can be, and preferably is, repetitively selected as hydrogen, e.g., 3-amino proprionic acid; NH2—(CH₂)₂—COO⁻. By way of example, an argininyl equivalent residue is preferably selected from the group consisting of argininyl and lysinyl because (1) these residues are naturally-occurring and are encoded by a mammalian gene or genome, and (2) these residues have (a) similar sizes (arginine having 7 side-chain atoms (excluding hydrogen atoms) and lysine having 5, ((5-7)/(7)×100%=28%)), and (b) these residues are bases having similar pK values (about 12 and 10, respectively).

An argininyl residue or an argininyl equivalent residue can be either natural or synthetic. In addition to an argininyl residue per se, a natural amino acid residue equivalent to an argininyl residue includes, but is not limited to, histidinyl and lysinyl, and is preferably lysinyl. A synthetic amino acid residue equivalent to and argininyl residue includes, but is not limited to, d-forms of argininyl, lysinyl, and histidinyl residues, as well as L- and D-, but preferably L-, ornithinyl, citrullinyl, and homoargininyl residues. The skilled artisan will recognize additional argininyl equivalents from FIG. 1.

A leucinyl residue or a leucinyl equivalent residue can be either natural or synthetic. Leucinyl equivalents include, but are not limited to, leucinyl, isoleucinyl, alaninyl, valinyl, norleucinyl, norvalinyl, sarcosinyl, β-alaninyl, and α-aminoisobutyryl. The skilled artisan will recognize additional leucinyl equivalents from FIG. 1. Of course, in any given polypeptide, substitutions are preferably limited in number. For example, in the polypeptide R*R*L*L*L*R*, all of the R* residues and all of the L* residues are most preferably argininyl and leucinyl, respectively; less preferably, one residue is other than argininyl or leucinyl, yet less preferably two or three residues are not argininyl or leucinyl, and least preferably four to six residues are not argininyl or leucinyl. Accordingly, a most preferred residue for R* is an argininyl residue.

Similarly, L* can be independently selected from the group consisting of leucinyl, isoleucinyl, and valinyl; preferably L* is leucinyl or isoleucinyl; and most preferably, L* is leucinyl. Additionally, L* can optionally be a d-form amino acid residue, and/or a synthetic residue such as, e.g., an α-aminoisobutyryl residue.

The substituent R³ can be any suitable pharmaceutically acceptable substituent. A pharmaceutically acceptably substituent need not, but can provide a function, such as homing to sites of inflammation, increasing the solubility in water of the present inventive polypeptide, and protecting side-chains of amino acid residues from oxidative or chemical attack. For example, a pharmaceutically acceptable substituent can be a biopolymer, such as a polypeptide, an RNA, a DNA, or a polysaccharide. Suitable polypeptides comprise fusion proteins, an antibody or fragment thereof, a cell adhesion molecule or a fragment thereof, or a peptide hormone. Suitable polysaccharides comprise polyglucose moieties, such as starch and derivatives thereof, such as heparin. R³ also can be any suitable lipid or lipid-containing moiety, such as a lipid of a liposome or a vesicle, saccharide or disaccharide, or even a lipophilic moiety, such as a prostaglandin, a steroid hormone, or a derivative of either of the foregoing. Additionally, R³ can be a nucleotide or a nucleoside, such as nicotine adenine dinucleotide or thymine. R³ also can be a vitamin, such as vitamin C, thiamine, or nicotinic acid. A pharmaceutically acceptable substituent can be a synthetic organic moiety, such as t-butyl carbonyl, an acetyl moiety, quinine, or polystyrene and another biologically acceptable polymer. A pharmaceutically acceptable substituent also can be R⁴, wherein R⁴ is selected from the group consisting of a C₁-C₁₈ alkyl, a C₂-C₁₈ alkenyl, a C₂-C₁₈ alkynyl, a C₆-C₁₈ aryl, a C₇-C₁₈ alkaryl, a C₇-C₁₈ aralkyl, and a C₃-C₁₈ cycloalkyl, wherein any of the foregoing R³ groups that are cyclic comprise from 0 to 2 atoms per carbocyclic ring, which can be the same or different, selected from the group consisting of nitrogen, oxygen, and sulfur.

R⁴ can be substituted by one to about six substituents, which can be the same or different, selected from the group consisting of an amino moiety, a carbamate moiety, a carbonate moiety, a phosphamate moiety, a phosphate moiety, a phosphonate moiety, a pyrophosphate moiety, a triphosphate moiety, a sulfamate moiety, a sulfate moiety, a sulfonate moiety, a C₁-C₈ monoalkylamine moiety, a C₁-C₈ dialkylamine moiety, and a C₁-C₈ trialkylamine moiety.

A preferred polypeptide of the first embodiment R¹R*R*L*L*L*R*R² is RRLLLR (SEQ ID NO:10), wherein R is argininyl and L is leucinyl. In a more preferred embodiment, R² of the formula R¹R*R*R*L*L*L*R*R² is a -(serinyl-valinyl-R⁵), and R⁵ is selected from the group consisting of hydrogen, a polypeptide of from 1 to about 98 amino acid residues, —NHR⁴, and R⁴, wherein R⁴ is as defined above and can be substituted as described above.

In a second embodiment, the present invention provides a polypeptide of the formula R^(10R) ¹¹XVL^(*2)L^(*2)VR¹², as well as pharmaceutically acceptable salts thereof. This embodiment is predicated, at least in part, on two surprising and unexpected discoveries. First, that a second domain of the α-chain of the IL-6 receptor that has the ability to bind to the IL-6 ligand comprises an important amino acid residue sequence —VLLV— (SEQ ID NO:18), which naturally occurs in the context TKAVLLVRF (SEQ ID NO:19). Second, that the binding affinity of this second domain is substantially increased if the lysinyl residue (in the larger subsequence) is replaced by an amino acid residue that does not have a side-chain that is basic under physiological conditions.

In this second embodiment, R¹⁰ and R¹² are pharmaceutically acceptable substituents. Examples of pharmaceutically acceptable substituents are provided above with respect to R³.

R¹¹ is selected from the group consisting of synthetic and naturally-occurring amino acid residues that have an acidic or neutral side-chain under physiological conditions. For example, R¹¹ can be selected from either the group consisting of alaninyl, asparaginyl, aspartyl, cysteinyl, glutaminyl, glutamyl, glycinyl, isoleucinyl, leucinyl, methioninyl, phenylalaninyl, prolinyl, serinyl, threoninyl, tryptophanyl, tyrosinyl, and valinyl, or the group consisting of norleucinyl, norvalinyl, sarcosinyl, β-alaninyl, α-aminoisobutyryl, γ aminopentane-1,5-dioyl, homoserinyl, hydroxyprolinyl, α-carboxyglutamyl, O-phosphoserinyl, O-phosphothreoninyl, and O-phosphotyrosinyl.

Similarly, X can be any synthetic or naturally-occurring amino acid residue, such as any synthetic or naturally-occurring amino acid residue that has an acidic or neutral side-chain under physiological conditions. That is, X can be selected from the group consisting of suitable R¹¹ residues, as well as from among the group consisting of argininyl, lysinyl, and histidinyl, or the group consisting of norleucinyl, norvalinyl, sarcosinyl, β-alaninyl, α-aminoisobutyryl, γ-aminopentane-1,5-dioyl, homoserinyl, hydroxyprolinyl, γ-carboxyglutamyl, O-phosphoserinyl, O-phosphothreoninyl, O-phosphotyrosinyl, ornithinyl, citrullinyl, and homoargininyl. However, X is preferably independently selected from the group denoted by R¹¹.

In the context of the formula R¹⁰R¹¹XVL^(*2)L^(*2)VR¹², V is valinyl and L^(*2) is leucinyl or isoleucinyl, and preferably leucinyl. As noted above, each substituent of the polypeptide is selected such that this present inventive polypeptide inhibits the binding of IL-6 with IL-6 receptor under physiological conditions.

The pharmaceutically acceptable group R¹² can optionally be the substituent R¹³-R¹⁴. Where R¹² is R¹³-R¹⁴, R¹³ is selected from the group consisting of synthetic and naturally-occurring amino acid residues having a side-chain that is acidic or neutral under physiological conditions, including, but not limited to norleucinyl, sarcosinyl, β-alaninyl, α-aminoisobutyryl, γ-aminopentane-1,5-dioyl, homoserinyl, hydroxyprolinyl, α-carboxyglutamyl, O-phosphoserinyl, O-phosphothreoninyl, and O-phosphotyrosinyl. Where R¹² is R¹³-R¹⁴, R¹⁴ is selected from the group consisting of hydrogen, a polypeptide of from 1 to about 100 amino acid residues, —NHR¹⁵, and R¹⁵. R¹⁵ is a pharmaceutically acceptable substituent group (see R³, supra). Preferably, R¹³ is selected from the group consisting of naturally-occurring amino acid residues having a side-chain that is acidic or neutral under physiological conditions. Alternatively, R¹³ is preferably selected from the group consisting of synthetic and naturally-occurring amino acid residues having a side-chain consisting of a C₁-C₆ straight-chained or branched alkyl moiety; for example, from the group consisting of glycinyl, alaninyl, isoleucinyl, leucinyl, valinyl, norleucinyl, sarcosinyl, β-alaninyl, and a-aminoisobutyryl. The polypeptide in which R¹³ is alaninyl is among the preferred polypeptides of the second embodiment.

In one polypeptide of the second embodiment, R¹⁵ is R¹⁶, and R¹⁶ is selected from the group consisting of hydrogen, a C₁-C₁₈ alkyl, a C₂-C₁₈ alkenyl, a C₂-C₁₈ alkynyl, a C₆-C₁₈ aryl, a C₇-C₁₈ alkaryl, a C₇-C₁₈ aralkyl, and a C₃-C₁₈ cycloalkyl, wherein any of the foregoing R¹⁶ groups that are cyclic comprise from 0 to 2 atoms per carbocyclic ring, which can be the same or different, selected from the group consisting of nitrogen, oxygen, and sulfur.

Optionally, R¹⁶ can be substituted by one to about six substituents, which can be the same or different, selected from the group consisting of an amino moiety, a carbamate moiety, a carbonate moiety, a phosphamate moiety, a phosphate moiety, a phosphonate moiety, a pyrophosphate moiety, a triphosphate moiety, a sulfamate moiety, a sulfate moiety, a sulfonate moiety, a C₁-C₈ monoalkylamine moiety, a C₁-C₈ dialkylamine moiety, and a C₁-C₈ trialkylamine moiety.

In another polypeptide of the second embodiment, R¹⁰ is selected from the group consisting of hydrogen, a polypeptide of from 1 to about 100 amino acid residues, R¹⁷C(O)—, and R¹⁷, wherein R¹⁷ is a pharmaceutically acceptable substituent group (see R³, supra).

Similarly to R¹⁶, R¹⁷ can be selected from the group consisting of hydrogen, a C₁-C₁₈ alkyl, a C₂-C₁₈ alkenyl, a C₂-C₁₈ alkynyl, a C₆-C₁₈ aryl, a C₇-C₁₈ alkaryl, a C₇-C₁₈ aralkyl, and a C₃-C₁₈ cycloalkyl, wherein any of the foregoing R¹⁷ groups that are cyclic comprise from 0 to 2 atoms per carbocyclic ring, which can be the same or different, selected from the group consisting of nitrogen, oxygen, and sulfur. In a preferred embodiment, R¹⁷ is hydrogen.

Optionally, R¹⁷ can be substituted by one to about six substituents, which can be the same or different, selected from the group consisting of an amino moiety, a carbamate moiety, a carbonate moiety, a phosphamate moiety, a phosphate moiety, a phosphonate moiety, a pyrophosphate moiety, a triphosphate moiety, a sulfamate moiety, a sulfate moiety, a sulfonate moiety, a C₁-C₈ monoalkylamine moiety, a C₁-C₈ dialkylamine moiety, and a C₁-C₈ trialkylamine moiety.

In a third embodiment, the present invention provides a polypeptide of the formula R²⁰R²¹L*R*Y*R*A*E*R*S*R²². This embodiment is predicated, at least in part, on three surprising and unexpected discoveries. First, that a third domain within the IL-6 receptor has the ability to bind to the IL-6 ligand and this domain has the essential core amino acid residue sequence —LRAERS— (SEQ ID NO:20), which naturally occurs in the larger subsequence -FELRAERSKT (SEQ ID NO:21). Second, that the affinity of this domain for the IL-6 ligand can be substantially enhanced if the acidic side chain of the first glutamyl residue in the larger sequence is eliminated or preferably is replaced by a small hydrophobic side-chain (e.g., as possessed by alanine). Third, that the lysinyl residue is preferably present and more preferably has a side-chain that is basic under physiological conditions.

In this third embodiment, R²⁰ and R²² are pharmaceutically acceptable substituents. The substituent R²¹ is selected from the group consisting of synthetic and naturally-occurring amino acid residues having a side-chain that is neutral or basic under physiological conditions, which includes, but clearly is not limited to, norleucinyl, norvalinyl, sarcosinyl, βalaninyl, α-aminoisobutyryl, homoserinyl, hydroxyprolinyl, ornithinyl, citrullinyl, and homoargininyl. Preferably, R²¹ is alaninyl.

Additionally, L*, Y*, E*, and S* are each independently selected from the group consisting of synthetic and naturally-occurring amino acid residues. L* is preferably leucinyl or isoleucinyl. More preferably, L* is leucinyl. The substituent Y* is preferably selected from the group consisting of tyrosinyl, phenylalaninyl, tryptophanyl, and α-aminoisobutyryl. More preferably, Y* is tyrosinyl or phenylalaninyl, and most preferably, tyrosinyl. The substituent E* is preferably selected from the group consisting of synthetic and naturally-occurring amino acid residues having acidic side-chains under physiological conditions. For example, E* can be selected from the group consisting of glutamyl, aspartyl, γ aminopentane-1,5-dioyl, O-phosphoserinyl, 0-phosphothreoninyl, and O-phosphotyrosinyl. More preferably, E* is selected from the group consisting of glutamyl, aspartyl, and γ aminopentane-1,5-dioyl. Yet more preferably, E* is glutamyl. The substituent S* is selected from the group consisting of serinyl; threoninyl, phosphoserinyl, and phosphothreoninyl, and preferably is serinyl. The substituent A* is selected from the group consisting of alaninyl, glycinyl, and valinyl, and preferably is alaninyl.

Preferably, R²⁰ is selected from the group consisting of a polypeptide of from 1 to about 100 amino acid residues, hydrogen, R²³ C(O)—, and R²³. Similarly, R²² is preferably selected from the group consisting of a polypeptide of from 1 to about 100 amino acid residues, hydrogen, —NHR²³, and R²³.

The substituent R²³ can be selected from the group consisting of a C₁-C₁₈ alkyl, a C₂-C₁₈ alkenyl, a C₂-C₁₈ alkynyl, a C₆-C₁₈ aryl, a C₇-C₁₈ alkaryl, a C₇-C₁₈ aralkyl, and a C₃-C₁₈ cycloalkyl, wherein any of the foregoing R²³ groups that are cyclic comprise from 0 to 2 atoms per carbocyclic ring, which can be the same or different, selected from the group consisting of nitrogen, oxygen, and sulfur.

R²³ can be substituted by one to about six substituents, which can be the same or different, selected from the group consisting of an amino moiety, a carbamate moiety, a carbonate moiety, a phosphamate moiety, a phosphate moiety, a phosphonate moiety, a pyrophosphate moiety, a triphosphate moiety, a sulfamate moiety, a sulfate moiety, a sulfonate moiety, a C₁-C₈ monoalkylamine moiety, a C₁-C₈ dialkylamine moiety, and a C₁-C₈ trialkylamine moiety.

R* is independently selected from the group consisting of synthetic or naturally-occurring amino acid residues having a side-chain that is basic under physiological conditions; for example, argininyl, lysinyl, ornithinyl, citrullinyl, or homoargininyl. Preferably, R* is selected from the group consisting of argininyl and lysinyl. More preferably, R* is argininyl.

A* is selected from the group consisting of alaninyl, glycinyl, isoleucinyl, leucinyl, valinyl, norleucinyl, norvalinyl, sarcosinyl, β-alaninyl, and α-aminoisobutyryl. Preferably, A* is alaninyl.

Additionally, the polypeptide of the third embodiment of the present invention can comprise additional polypeptides or protein motifs. Preferably, the present inventive polypeptide does not comprise more than about 200, and preferably more than about 50, additional amino acid residues that have an amino acid residue sequence that is identical (or at least 60% identical over a span of five or ten amino acid residues) to another amino acid residue sequence from the same chain of the IL-6 receptor.

In a fourth embodiment, the present invention provides a polypeptide, which comprises a sequence that inhibits binding of IL-6 ligand with IL-6 receptor under physiological conditions. The sequence comprises at least a polypeptide of the formula I*A*I*V*L*R*F*. This embodiment is predicated, at least in part, on the surprising and unexpected discovery that a fourth domain of the IL-6 receptor occurs in the membrane-associated region of the receptor, and this domain is centered about a region of the receptor having an amino acid residue sequence of IAIVLRFK (SEQ ID NO:23). This embodiment is further predicated on the surprising and unexpected discovery that this domain is highly tolerant of amino acid residue substitutions. For example, the basic residues of this sequence (i.e., argininyl and lysinyl) can be replaced by a non-conservative alaninyl substitution, which has the surprising effect of increasing the affinity of the domain for the IL-6 ligand.

In this fourth embodiment I*, L*, and V* are independently selected from the group consisting of synthetic and naturally-occurring amino acid residues having a side-chain consisting of a C₁-C₆ straight-chain or branched alkyl moiety.

R* is independently selected from the group consisting of synthetic and naturally-occurring amino acid residues having a side-chain that is basic under physiological conditions. For example, R* can be selected from the group consisting of argininyl, lysinyl, ornithinyl, citrullinyl, and homoargininyl. When R* is to be translated from a nucleic acid, R* preferably is selected from the group consisting of argininyl and lysinyl. R* is more preferably argininyl.

A* is selected from the group consisting of alaninyl, glycinyl, isoleucinyl, leucinyl, valinyl, norleucinyl, norvalinyl, sarcosinyl, β-alaninyl, and α-aminoisobutyryl.

F* is selected from the group consisting of tyrosinyl, phenylalaninyl, tryptophanyl, and α-aminoisobutyryl.

Preferably, at least four of the seven substituents, more preferably at least five substituents, yet more preferably at least six substituents of I*A*I*V*L*R*F, are selected such that I* is isoleucinyl, A* is alaninyl, V* is valinyl, L* is leucinyl, R is argininyl, and F* phenylalaninyl. Of course, all seven amino acid residues can be selected such that I*A*I*V*L*R*F* is IAIVLRFK (SEQ ID NO:23). The polypeptide is preferably selected such that it is small enough to bind effectively to IL-6 and does not comprise unnecessary extra atoms (making synthesis and processing of the polypeptide easier). The polypeptide preferably comprises less than about 200 amino acid residues, alternatively less than about 100 amino acid residues, alternatively less than about 30 amino acid residues, and alternatively less than about 16 amino acid residues that have a sequence that is identical to that of a region of the (α-chain of the IL-6 receptor.

Surprisingly, the affinity of the polypeptide for binding with IL-6 increases if any one, preferably two, and more preferably three, amino acid residues are bound via peptide bonds to the carboxyl-terminus of the sequence I*A*I*V*L*R*F*. Accordingly, the polypeptide preferably comprises at least the sequence IAIVLRFKXX (SEQ ID NO:24) in which X is any synthetic or naturally-occurring amino acid residue, as defined above, and preferably a synthetic or naturally-occurring amino acid residue of the formula NH₂—(CHR^(a))—COO⁻. Optionally, the sequence can comprise an amino-terminal tripeptide of the formula LLC-, or conservatively or neutrally substituted equivalents of LLC-. In this regard, the sequence can comprise at least the sequence LLCIAIVLRFK (SEQ ID NO:25). Additionally, the sequence can comprise at least the sequence FGTLLCIAIVLRFKKT (SEQ ID NO:26).

A fifth embodiment of the present invention is predicated on the surprising and unexpected discovery that the amino acid sequence SVIILKYNIQY (SEQ ID NO:6), which is a subsequence of the β-chain amino acid sequence of the IL-6 receptor, is critical in the binding between IL-6 ligand and IL-6 receptor. Accordingly, the present invention also provides a polypeptide that inhibits the binding of IL-6 ligand with IL-6 receptor under physiological conditions. The present inventive polypeptide of this fifth embodiment comprises the sequence SVIILKYNIQY (SEQ ID NO:6) and has an amino acid residue sequence of up to about 200 amino acid residues, preferably about 100 residues, more preferably about 50 residues, and optionally no or essentially no additional residues, that are identical to the β-chain of the IL-6 receptor or alternatively are at least about 60% identical over a span of about five or ten contiguous amino acid residues.

Biochemical analysis of this sequence revealed that the binding interaction is somewhat stronger if the sequence SVIILKYNIQY (SEQ ID NO:6), is extended on the amino terminus to include the sequence PSIK-. Accordingly, the present invention also provides a polypeptide of this fifth embodiment comprising the sequence PSIKSVIILKYNIQY (SEQ ID NO:14). Similar analyses further defined a region governing the binding between IL-6 ligand and its receptor. These analyses resulted in the identification and provision of polypeptides comprising the sequences WTNPSIKSVIILKYNIQY (SEQ ID NO:15)and KLTWTNPSIKSVIILKYNIQY (SEQ ID NO:16), and up to about 200 amino acid residues that have an identical residue sequence to the sequence of the β-chain of the IL-6 receptor. Preferably, the polypeptides comprising the recited sequences comprise up to about 100 amino acid residues, more preferably, up to about 50 amino acid residues, from the IL-6 receptor β-chain sequence. Optionally, the polypeptide comprises no other, or essentially no other, sequence of amino acid residues that has an identical sequence to the sequence of the IL-6 receptor β-chain over a continuous stretch of five, or more preferably three, amino acid residues other than the sequences explicitly recited above. Additionally, the present inventive sequences preferably do not comprise a region of higher than about 60% homology to the IL-6 receptor over a stretch of at least five or ten contiguous amino acid residues, outside the region of the IL-6 receptor β-chain sequences explicitly recited above.

Alternatively, the present inventive β-chain polypeptides comprise a sequence consisting essentially of the recited sequence and polypeptides from other sources or origins that primarily contribute a function that is not directly related to IL-6 function or signaling.

In additional (sixth, seventh, and eighth) embodiments, the present invention provides a polypeptide of up to about 200 amino acid residues having a sequence that is identical to a portion of the sequence TRWKSHLQNYTVNATKLTVNLTNDRYLATLTVRNLVGKSDAAVL (SEQ ID NO:7), QLPVDVQNGFIRNYTIFYRTIIGN (SEQ ID NO:8), or IVVPVCLAFLLTTLLGVLFCFNKRDLIKKHIWPNVPDPSKSHIA (SEQ ID NO:9), and that inhibits the binding of IL-6 ligand with IL-6 receptor under physiological conditions. The portion of the sequence can be any suitable size. For example, the portion of the amino acid sequence can be about a 6-mer, about a 12-mer, about an 18-mer, or about a 24-mer. An “n”-mer, as is understood in the art, is an oligopolymer consisting of “n” monomeric components or residues. Thus, a polypeptide comprising a portion of any of the preceding sequences that is a 6-mer, would comprise an amino acid sequence of any six adjacent residues of any one of the three preceding amino acid sequences. Preferably, the polypeptide comprises no more than about 100 amino acid residues, and more preferably no more than about 50 amino acid residues, having a sequence identical to that of the IL-6 receptor β-chain.

Conservative or neutral amino acid substitutions that do not destroy the ability of any of the above-described polypeptides to bind to IL-6 can be made. The replacement residues that substitute for the amino acid residues explicitly recited above can be either synthetic or naturally-occurring. Preferably, the number of substitutions is kept to a minimum, e.g., from 1 to about 6 conservative or neutral substitutions, and more preferably from 1 to about 3 conservative or neutral amino acid residue substitutions. While the residues substituted for the recited amino acid residues can be natural or synthetic, natural residues are preferred in those instances in which it is desirable for the amino acid residues to be encoded by a nucleic acid.

Additionally, any embodiment of the foregoing present inventive polypeptide can further comprise a pharmaceutically acceptable substituent, which is selected so that the polypeptide retains the ability to inhibit the binding of IL-6 ligand with IL-6 receptor under physiological conditions.

Also provided by the present invention is a nucleic acid that encodes an above-described polypeptide, which consists of naturally-occurring amino acid residues. The nucleic acid can be expressed in a cell.

In another embodiment, the present invention also provides a vector comprising a nucleic acid molecule as described above. A nucleic acid molecule as described above can be cloned into any suitable vector and can be used to transduce, transform, or transfect any suitable host. The selection of vectors and methods to construct them are commonly known to persons of ordinary skill in the art and are described in general technical references (see, in general, “Recombinant DNA Part D,” Methods in Enzymology, Vol. 153, Wu and Grossman, eds., Academic Press (1987)). Desirably, the vector comprises regulatory sequences, such as transcription and translation initiation and termination codons, which are specific to the type of host (e.g., bacterium, fungus, plant, or animal) into which the vector is to be inserted, as appropriate and taking into consideration whether the vector is DNA or RNA. Preferably, the vector comprises regulatory sequences that are specific to the genus of the host. Most preferably, the vector comprises regulatory sequences that are specific to the species of the host and is optionally optimized for the expression of an above-described polypeptide.

Constructs of vectors, which are circular or linear, can be prepared to contain an entire nucleic acid sequence as described above or a portion thereof ligated to a replication system that is functional in a prokaryotic or eukaryotic host cell. Replication systems can be derived from ColE1, 2 mμ plasmid, λ, SV40, bovine papilloma virus, and the like.

Suitable vectors include those designed for propagation and expansion, or for expression, or both. A preferred cloning vector is selected from the group consisting of the pUC series, the pBluescript series (Stratagene, LaJolla, Calif.), the pET series (Novagen, Madison, Wis.), the pGEX series (Pharmacia Biotech, Uppsala, Sweden), and the pEX series (Clonetech, Palo Alto, Calif.). Examples of animal expression vectors include pEUK-C1, pMAM and pMAMneo (Clonetech, Palo Alto, Calif.).

An expression vector can comprise a native or nonnative promoter operably linked to a nucleic acid molecule encoding an above-described polypeptide. The selection of promoters, e.g., strong, weak, inducible, tissue-specific and developmental-specific, is within the skill in the art. Similarly, the combining of a nucleic acid molecule as described above with a promoter is also within the skill in the art.

The nucleic acid encoding the polypeptide can be operably linked to a signal sequence that causes secretion of at least the polypeptide by a cell in which the nucleic acid is expressed. Signal sequences (alternatively called secretion sequences) are well-known in the art.

Alternatively, the nucleic acid comprises or encodes an antisense nucleic acid molecule or a ribozyme that is specific for a naturally-occurring, specified amino acid sequence of an above-described polypeptide. A nucleic acid sequence introduced in antisense suppression generally is substantially identical to at least a portion of the endogenous gene or gene to be repressed, but need not be identical. Thus, the vectors can be designed such that the inhibitory effect applies to other proteins within a family of genes exhibiting homology or substantial homology to the target gene. The introduced sequence also need not be full-length relative to either the primary transcription product or fully processed mRNA. Generally, higher homology can be used to compensate for the use of a shorter sequence. Furthermore, the introduced sequence need not have the same intron or exon pattern, and homology of non-coding segments will be equally effective.

Ribozymes also have been reported to have use as a means to inhibit expression of endogenous genes. It is possible to design ribozymes that specifically pair with virtually any target RNA and cleave the phosphodiester backbone at a specific location, thereby functionally inactivating the target RNA. In carrying out this cleavage, the ribozyme is not itself altered and is, thus, capable of recycling and cleaving other molecules, making it a true enzyme. The inclusion of ribozyme sequences within antisense RNAs confers RNA-cleaving activity upon them, thereby increasing the activity of the constructs. The design and use of target RNA-specific ribozymes is described in Haseloff et al., Nature 334: 585-591 (1988).

Further provided by the present invention is a composition comprising an above-described polypeptide or nucleic acid and a carrier therefor. Another composition provided by the present invention is a composition comprising an antibody to an above-described polypeptide, an anti-antibody to an above described polypeptide, or a solid support matrix to which is attached an above-described polypeptide or an anti-antibody to the polypeptide sequence RRLLLR (SEQ ID NO:10), RXVLLV (SEQ ID NO:11), LRYRAERS (SEQ ID NO:12), IAIVLRF (SEQ ID NO:13), SVIILKYNIQY (SEQ ID NO:6), PSIKSVIILKYNIQY (SEQ ID NO:14), WTNPSIKSVIILKYNIQY (SEQ ID NO:15), KLTWTNPSIKSVIILKYNIQY (SEQ ID NO:16), TRWKSHLQNYTVNATKLTVNLTNDRYLATLTVRNLVGKSDAAVL (SEQ ID NO:7), QLPVDVQNGFIRNYTIFYRTIIGN (SEQ ID NO:6), or IVVPVCLAFLLTTLLGVLFCFNKRDLIKKHIWPNVPDPSKSHIA (SEQ ID NO:9).

Antibodies can be generated in accordance with methods known in the art. See, for example, Benjamin, In Immunology: a short course, Wiley-Liss, NY, 1996, pp. 436-437; Kuby, In Immunology, 3rd. ed., Freeman, NY, 1997, pp. 455-456; Greenspan et al., FASEB J. 7: 437-443 (1993); and Poskitt, Vaccine 9: 792-796 (1991). Anti-antibodies (i.e., anti-idiotypic antibodies) also can be generated in accordance with methods known in the art (see, for example, Benjamin, In Immunology: a short course, Wiley-Liss, NY, 1996, pp. 436-437; Kuby, In Immunology, 3rd. ed., Freeman, NY, 1997, pp. 455-456; Greenspan et al., FASEB J., 7, 437-443, 1993; Poskitt, Vaccine, 9, 792-796, 1991; and Madiyalakan et al., Hybridonor 14: 199-203 (1995) (“Anti-idiotype induction therapy”)). Such antibodies can be obtained and employed either in solution-phase or coupled to a desired solid-phase matrix. Having in hand such antibodies, one skilled in the art will further appreciate that such antibodies, using well-established procedures (e.g., such as described by Harlow and Lane (1988, supra), are useful in the detection, quantification, or purification of IL-6 ligand, IL-6 receptor, conjugates of each and host cells transformed to produce IL-6 receptor or a derivative thereof. Such antibodies are also useful in a method of prevention or treatment of a disease or dysfunction in an animal in which it is desirable to inhibit IL-6 signaling or function, as provided herein.

In view of the above, the present invention also provides a method of producing an antibody to the specific amino acid sequence of an above-described polypeptide. The method comprises administering an above-described polypeptide to an animal. The animal generates anti-polypeptide antibodies. Such an antibody can be administered to an animal to prevent or treat a disease or dysfunction in an animal in which it is desirable to inhibit IL-6 signaling or function, as provided herein.

Although nonhuman antibodies are useful for prophylactic or therapeutic treatment in humans, their favorable properties, in certain instances, can be further enhanced and/or their adverse properties further diminished, through “humanization” strategies, such as those recently reviewed by Vaughan, Nature Biotech., 16, 535-539, 1998.

Prior to administration to an animal, such as a mammal, in particular a human, an above-described polypeptide, nucleic acid or antibody can be formulated into various compositions by combination with appropriate carriers, in particular, pharmaceutically acceptable carriers or diluents, and can be formulated to be appropriate for either human or veterinary applications.

Thus, a composition for use in the method of the present invention can comprise one or more of the aforementioned polypeptides, nucleic acids or antibodies, preferably in combination with a pharmaceutically acceptable carrier. Pharmaceutically acceptable carriers are well-known to those skilled in the art, as are suitable methods of administration. The choice of carrier will be determined, in part, by whether a polypeptide or a nucleic acid is to be administered, as well as by the particular method used to administer the composition. One skilled in the art will also appreciate that various routes of administering a composition are available, and, although more than one route can be used for administration, a particular route can provide a more immediate and more effective reaction than another route. Accordingly, there are a wide variety of suitable formulations of compositions that can be used in the present inventive methods.

A composition in accordance with the present invention, alone or in further combination with one or more other active agents, can be made into a formulation suitable for parenteral administration, preferably intraperitoneal administration. Such a formulation can include aqueous and nonaqueous, isotonic sterile injection solutions, which can contain antioxidants, buffers, bacteriostats, and solutes that render the formulation isotonic with the blood of the intended recipient, and aqueous and nonaqueous sterile suspensions that can include suspending agents, solubilizers, thickening agents, stabilizers, and preservatives.

The formulations can be presented in unit dose or multi-dose sealed containers, such as ampules and vials, and can be stored in a freeze-dried (lyophilized) condition requiring only the addition of the sterile liquid carrier, for example, water, for injections, immediately prior to use. Extemporaneously injectable solutions and suspensions can be prepared from sterile powders, granules, and tablets, as described herein.

A formulation suitable for oral administration can consist of liquid solutions, such as an effective amount of the compound dissolved in diluents, such as water, saline, or fruit juice; capsules, sachets or tablets, each containing a predetermined amount of the active ingredient, as solid or granules; solutions or suspensions in an aqueous liquid; and oil-in-water emulsions or water-in-oil emulsions. Tablet forms can include one or more of lactose, mannitol, corn starch, potato starch, microcrystalline cellulose, acacia, gelatin, colloidal silicon dioxide, croscarmellose sodium, talc, magnesium stearate, stearic acid, and other excipients, colorants, diluents, buffering agents, moistening agents, preservatives, flavoring agents, and pharmacologically compatible carriers.

Similarly, a formulation suitable for oral administration can include lozenge forms, which can comprise the active ingredient in a flavor, usually sucrose and acacia or tragacanth; pastilles comprising the active ingredient in an inert base, such as gelatin and glycerin, or sucrose and acacia; and mouthwashes comprising the active ingredient in a suitable liquid carrier; as well as creams, emulsions, gels, and the like containing, in addition to the active ingredient, such carriers as are known in the art.

An aerosol formulation suitable for administration via inhalation also can be made. The aerosol formulation can be placed into a pressurized acceptable propellant, such as dichlorodifluoromethane, propane, nitrogen, and the like.

A formulation suitable for topical application can be in the form of creams, ointments, or lotions.

A formulation for rectal administration can be presented as a suppository with a suitable base comprising, for example, cocoa butter or a salicylate. A formulation suitable for vaginal administration can be presented as a pessary, tampon, cream, gel, paste, foam, or spray formula containing, in addition to the active ingredient, such carriers as are known in the art to be appropriate.

Important general considerations for design of delivery systems and compositions, and for routes of administration, for polypeptide drugs also apply (Eppstein, CRC Crit. Rev. Therapeutic Drug Carrier Systems 5, 99-139, 1988; Siddiqui et al., CRC Crit. Rev. Therapeutic Drug Carrier Systems 3, 195-208, 1987); Banga et al., Int. J. Pharmaceutics 48, 15-50, 1988; Sanders, Eur. J. Drug Metab. Pharmacokinetics 15, 95-102, 1990; Verhoef, Eur. J. Drug Metab. Pharmacokinetics 15, 83-93, 1990). The appropriate delivery system for a given polypeptide will depend upon its particular nature, the particular clinical application, and the site of drug action. As with any protein drug, oral delivery will likely present special problems, due primarily to instability in the gastrointestinal tract and poor absorption and bioavailability of intact, bioactive drug therefrom. Therefore, especially in the case of oral delivery, but also possibly in conjunction with other routes of delivery, it will be necessary to use an absorption-enhancing agent in combination with a given polypeptide. A wide variety of absorption-enhancing agents have been investigated and/or applied in combination with protein drugs for oral delivery and for delivery by other routes (Verhoef (1990), supra; van Hoogdalem, Pharmac. Ther. 44: 407-443, (1989); Davis, J. Pharm. Pharmacol. 44(Suppl. 1): 186-190, (1992). Most commonly, typical enhancers fall into the general categories of (a) chelators, such as EDTA, salicylates, and N-acyl derivatives of collagen, (b) surfactants, such as lauryl sulfate and polyoxyethylene-9-lauryl ether, (c) bile salts, such as glycholate and taurocholate, and derivatives, such as taurodihydrofusidate, (d) fatty acids, such as oleic acid and capric acid, and their derivatives, such as acylcarnitines, monoglycerides, and diglycerides, (e) non-surfactants, such as unsaturated cyclic ureas, (f) saponins, (g) cyclodextrins, and (h) phospholipids.

Other approaches to enhancing oral delivery of protein drugs can include the aforementioned chemical modifications to enhance stability to gastrointestinal enzymes and/or increased lipophilicity. Alternatively, the protein drug can be administered in combination with other drugs or substances that directly inhibit proteases and/or other potential sources of enzymatic degradation of proteins. Yet another alternative approach to prevent or delay gastrointestinal absorption of protein drugs is to incorporate them into a delivery system that is designed to protect the protein from contact with the proteolytic enzymes in the intestinal lumen and to release the intact protein only upon reaching an area favorable for its absorption. A more specific example of this strategy is the use of biodegradable microcapsules or microspheres, both to protect vulnerable drugs from degradation, as well as to effect a prolonged release of active drug (Deasy, in Microencapsulation and Related Processes, Swarbrick, ed., Marcell Dekker, Inc.: New York, 1984, pp. 1-60, 88-89, 208-211). Microcapsules also can provide a useful way to effect a prolonged delivery of a protein drug, such as an above-described polypeptide, after injection (Maulding, J. Controlled Release 6, 167-176, 1987).

In view of the above, the present invention further provides a method of prophylactically or therapeutically inhibiting IL-6 signaling in a mammal in need thereof. The method comprises administering to the mammal an IL-6 signaling-inhibiting effective amount of an above-described polypeptide, nucleic acid, or antibody to an above-described polypeptide or a nucleic acid encoding such a polypeptide.

The dose administered to an animal, such as a mammal, particularly a human, in the context of the present invention should be sufficient to effect a therapeutic or prophylactic (which desirably, but not necessarily, means absolute prevention as any degree of inhibition of IL-6 signaling in a mammal in need thereof is deemed beneficial) response in the individual over a reasonable time frame. The dose will be determined by the particular polypeptide, nucleic acid or antibody, administered, the severity of any existing disease state, as well as the body weight and age of the individual. The size of the dose also will be determined by the existence of any adverse side effects that may accompany the use of the particular polypeptide, nucleic acid or antibody employed. It is always desirable, whenever possible, to keep adverse side effects to a minimum.

The dosage can be in unit dosage form, such as a tablet or capsule. The term “unit dosage form” as used herein refers to physically discrete units suitable as unitary dosages for human and animal subjects, each unit containing a predetermined quantity of a vector, alone or in combination with other active agents, calculated in an amount sufficient to produce the desired effect in association with a pharmaceutically acceptable diluent, carrier, or vehicle. The specifications for the unit dosage forms of the present invention depend on the particular embodiment employed and the effect to be achieved, as well as the pharmacodynamics associated with each polypeptide, nucleic acid or antibody in the host. The dose administered should be an “IL-6 signaling-inhibiting effective amount” of an above-described active agent to achieve an “effective level” in the individual patient.

With respect to the above methods, sufficient amounts can be determined in accordance with methods known in the art. Similarly, the sufficiency of an immune response in an animal also can be assessed in accordance with methods known in the art. Either one of the above methods can further comprise concurrent, pre- or post-treatment with an adjuvant to enhance the immune response (see, for example, Harlow et al. (1988), supra).

Since the “effective level” is used as the preferred endpoint for dosing, the actual dose and schedule can vary, depending on interindividual differences in pharmacokinetics, drug distribution, and metabolism. The “effective level” can be defined, for example, as the blood or tissue level desired in the patient that corresponds to a concentration of one or more polypeptides, nucleic acids or antibodies according to the invention. The “effective level” for a polypeptide, nucleic acid or antibody of the present invention also can vary when the compositions of the present invention are used in combination with other known active agents.

One skilled in the art can easily determine the appropriate dose, schedule, and method of administration for the exact formulation of the composition being used, in order to achieve the desired “effective level” in the individual patient. One skilled in the art also can readily determine and use an appropriate indicator of the “effective level” of a polypeptide, nucleic acid or antibody of the present invention by a direct or indirect analysis of appropriate patient samples (e.g., blood and/or tissues).

It also will be appreciated by one skilled in the art that an above-described nucleic acid can be inserted ex vivo into animal cells, such as mammalian cells, in particular human cells, previously removed from such an animal. Such transformed autologous or homologous host cells, reintroduced into the animal or human, will express directly the corresponding polypeptide in vivo. The feasibility of such a therapeutic strategy to deliver a therapeutic amount of an agent in close proximity to the desired target cells has been demonstrated in studies with cells engineered ex vivo to express sCD4 (Morgan et al., (1994), supra). As an alternative to ex vivo insertion of the DNA sequences of the present invention, such sequences can be inserted into cells directly in vivo, such as by use of an appropriate viral or other suitable vector. Such cells transfected in vivo are expected to produce effective amounts of an above-described polypeptide directly in vivo.

Given the present disclosure, it will be additionally appreciated that an above-described nucleic acid sequence can be inserted into suitable nonmammalian host cells, and that such host cells will express therapeutic or prophylactic amounts of the desired polypeptide directly in vivo within a desired body compartment of an animal, in particular a human.

In addition, the present invention provides a method of removing IL-6 ligand from a bodily fluid of a mammal. The method comprises extracorporeally contacting the bodily fluid of the animal with a solid-support matrix to which is attached an above-described polypeptide or an anti-antibody to the polypeptide sequence RRLLLR (SEQ ID NO:10), RXVLLV (SEQ ID NO:11), LRYRAERS (SEQ ID NO:12), IAIVLRF (SEQ ID NO:13), SVIILKYNIQY (SEQ ID NO:6), PSIKSVIILKYNIQY (SEQ ID NO:14), WTNPSIKSVIILKYNIQY (SEQ ID NO:15), KLTWTNPSIKSVIILKYNIQY (SEQ ID NO:16), TRWKSHLQNYTVNATKLTVNLTNDRYLATLTVRNLVGKSDAAVL (SEQ ID NO:7), QLPVDVQNGFIRNYTIFYRTIIGN (SEQ ID NO:8), or IVVPVCLAFLLTTLLGVLFCFNKRDLIKKHIWPNVPDPSKSHIA (SEQ ID NO:9). Alternatively, the bodily fluid can be contacted with the polypeptide or anti-antibody in solution and then the solution can be contacted with a solid support matrix to which is attached a means to remove the polypeptide or anti-antibody to which is bound IL-6 ligand from the bodily fluid. The method further comprises separating the bodily fluid and the solid support matrix by any suitable means.

Methods of attaching an above-described polypeptide or an anti-antibody to a solid support matrix are known in the art. “Attached” is used herein to refer to attachment to (or coupling to) and immobilization in or on a solid support matrix. See, for example, Harris, in Poly(Ethylene Glycol) Chemistry: Biotechnical and Biomedical Applications, Harris, ed., Plenum Press: New York (1992), pp. 1-14) and international patent application WO 91/02714 (Saxinger). Diverse applications and uses of functional polypeptides attached to or immobilized on a solid support matrix are exemplified more specifically for poly(ethylene glycol) conjugated proteins or peptides in a review by Holmberg et al. (In Poly(Ethylene Glycol) Chemistry: Biotechnical and Biomedical Applications, Harris, ed., Plenum Press: New York, 1992, pp. 303-324).

EXAMPLES

The following examples further illustrates the present invention but, of course, should not be construed as limiting the scope of the claimed invention in any way.

Synthetic peptide arrays were constructed in 96-well microtiter plates in accordance with the method set forth in WO 91/02714 (Saxinger), and used to test the binding of recombinant human IL-6 that had been labeled with radioactive iodine (radiolabeling by standard methods). After incubating the radiolabeled IL-6 ligand in a well with each synthetic peptide, a washing step was performed to remove unbound label, and the relative level of radioactivity remaining in each well of the plate was evaluated to determine the relative affinity of each peptide for IL-6 ligand. The synthesis of the peptides and the quantity of binding between the synthetic peptides and IL-6 ligand were found to be suitably reproducible, precise, and sensitive. Initial screening of the entire primary sequence of the IL-6 receptor molecule, taken 21 amino acid residues at a time, identified active binding sequences in four regions of the receptor corresponding to amino acid residues 66-86 (AAGSHPSRWAGMGRRLLLRSV) (SEQ ID NO:27), 136-156 (PRSTPSLTTKAVLLVRKFQNS) (SEQ ID NO:72), 246-266 (SSFYRLRFELRYRAERSKTFT) (SEQ ID NO:119), and 371-391 (GGSLAFGTLLCIAIVLRFKKT) (SEQ ID NO:168) (hereinafter domains I, II, III, and IV).

The authenticity of the binding signal was confirmed, at least for domains I-III, by demonstrating that antibodies that specifically bind to IL-6 ligand were able to inhibit the binding reactions. The binding between domain IV and IL-6 ligand was not similarly shown to be authentic because domain IV resides in the transmembrane region of the protein and is not believed to have been present in the soluble receptor used as an immunogen to raise the antibodies to IL-6 ligand.

Each of the four binding domains was analyzed in detail, which is set forth in these examples. First, serial truncations (or nested truncations) were performed from each end of the peptides to determine the location of the critical binding residues within each domain. Second, each amino acid residue in the critical regions of each domain were serially replaced by an alaninyl residue to indicate whether the side-chain of the residue at each particular location is likely to be essential or important to the mechanism of binding.

Example 1

This example provides data identifying domain I, as well as amino acid residues that are essential and/or important in the binding of domain I to human IL-6.

Peptide Identifier Peptide Sequence SEQ ID No: Counts/minute bound  A1: AAGSHPSRWAGMGRRLLLRSV 27 10739  A2: AAGSHPSRWAGMGRRLLLRS 28 9764  A3: AAGSHPSRWAGMGRRLLLR 29 8007  A4: AAGSHPSRWAGMGRRLLL 30 5276  A5: AAGSHPSRWAGMGRRLL 31 2747  A6: AAGSHPSRWAGMGRRL 32 1753  A7: AAGSHPSRWAGMGRR 33 1344  A8: AAGSHPSRWAGMGR 34 1478  A9: AAGSHPSRWAGMG 35 1474 A10: AAGSHPSRWAGM 36 1444 A11: AAGSHPSRWAG 37 1427 A12: AAGSHPSRWA 38 1328 A13: AAGSHPSRW 39 1520 A14: AAGSHPSR 40 1353 A15: AAGSHPS 41 1316 A16: AAGSHP 42 1574 A17: AAGSHPSRWAGMGRRLLLRSV 43 10884 A18:  AGSHPSRWAGMGRRLLLRSV 13393 A19:   GSHPSRWAGMGRRLLLRSV 44 10994 A20:    SHPSRWAGMGRRLLLRSV 45 12048 A21:     HPSRWAGMGRRLLLRSV 46 11969 A22:      PSRWACMGRRLLLRSV 47 11087 A23:       SRWAGMGRRLLLRSV 48 8272 A24:        RWAGMGRRLLLRSV 49 12069 A25:         WAGMGRRLLLRSV 50 12166 A26:          AGMGRRLLLRSV 51 7623 A27:           GMGRRLLLRSV 52 6820 A28:            MGRRLLLRSV 53 7136 A29:             GRRLLLRSV 54 5367 A30:              RRLLLRSV 55 5972 A31:               RLLLRSV 56 5464 A32:                LLLRSV 57 1599 A33: AAGSHPSRWAGMGRRLLLRSV 27 10213 A34: AAGSHPSRWAGMGRRLLLRS 58 11797 A35: AAGSHPSRWAGMGRRLLLRV 59 11201 A36: AAGSHPSRWAGMGRRLLLSV 60 4895 A37: AAGSHPSRWAGMGRRLLRSV 61 7728 A38: AAGSHPSRWAGMGRRLLRSV 62 7079 A39: AAGSHPSRWAGMGRRLLRSV 63 5283 A40: AAGSHPSRWAGMGRLLLRSV 64 4247 A41: AAGSHPSRWARLLLRSV 65 4461 A42: AAGSHPSRWAGM 66 12259 A43: AAGSHPSRWAGGRRLLLRSV 67 13521 A44: AAGSHPSRWAMGRRLLLRSV 68 11854 A45: AAGSHPSRAGMGRRLLLRSV 69 8040 A46: AAGSHPSWAGMGRRLLLRSV 70 9523 A47: AAGSHPRWAGMGRRLLLRSV 71 11291

These data indicate that the sequence RRLLLR (SEQ ID NO:10) is a critical binding region within domain I, that domain I is preferably flanked on the amino-terminus by a pharmaceutically acceptable substituent equivalent in size to three amino acid residues, e.g., any three amino acid residues, and is preferably flanked on the carboxyl-terminus by a pharmaceutically acceptable substituent equivalent in size to at least one amino acid residue, and preferably two or three or more amino acid residues.

Example 2

This example provides data identifying the critical binding regions of domain II, as well as which residues within the critical binding domain that are essential and/or important in the binding of human IL-6 to IL-6 receptor within domain II.

Peptide identifier Peptide Sequence SEQ ID NO: Counts/minute bound  B1: PRSTPSLTTKAVLLVRKFQNS 72 10790  B2: PRSTPSLTTKAVLLVRKFQN 73 7930  B3: PRSTPSLTTKAVLLVRKFQ 74 7075  B4: PRSTPSLTTKAVLLVRKF 75 4689  B5: PRSTPSLTTKAVLLVRK 76 3962  B6: PRSTPSLTTKAVLLVR 77 4355  B7: PRSTPSLTTKAVLLV 78 3401  B8: PRSTPSLTTKAVLL 79 1846  B9: PRSTPSLTTKAVL 80 1402 B10: PRSTPSLTTKAV 81 1216 B11: PRSTPSLTTKA 82 1240 B12: PRSTPSLTTK 83 1313 B13: PRSTPSLTT 84 1053 B14: PRSTPSLT 85 930 B15: PRSTPSL 86 985 B16: PRSTPS 87 1015 B17: PRSTPSLTTKAVLLVRKFQNS 72 12347 B18:  RSTPSLTTKAVLLVRKFQNS 88 12958 B19:   STPSLTTKAVLLVRKFQNS 89 12150 B20:    TPSLTTKAVLLVRKFQNS 90 12885 B21:     PSLTTKAVLLVRKFQNS 91 13294 B22:      SLTTKAVLLVRKFQNS 92 12645 B23:       LTTKAVLLVRKFQNS 93 12153 B24:        TTKAVLLVRKFQNS 94 7014 B25:         TKAVLLVRKFQNS 95 5753 B26:         TKAVLLVRKFQNS 95 5226 B27:          KAVLLVRKFQNS 96 5604 B28:           AVLLVRKFQNS 97 9073 B29:            VLLVRKFQNS 98 9099 B30:             LLVRKFQNS 99 7205 B31:              LVRKFQNS 100 2525 B32:               VRKFQNS 101 1182 B33: PRSTPSLTTKAVLLVRKFQNS 72 11699 B34: PRSTPSLTTKAVLLVRKFQN 102 11450 B35: PRSTPSLTTKAVLLVRKFQS 103 13185 B36: PRSTPSLTTKAVLLVRKFNS 104 10090 B37: PRSTPSLTTKAVLLVRKQNS 105 11556 B38: PRSTPSLTTKAVLLVRFQNS 106 11117 B39: PRSTPSLTTKAVLLVKFQNS 107 10786 B40: PRSTPSLTTKAVLLRKFQNS 108 4542 B41: PRSTPSLTTKVRKFQNS 109 3758 B42: PRSTPSLTTKAV 110 3838 B43: PRSTPSLTTKALLVRKFQNS 111 7157 B44: PRSTPSLTTAVLLVRKFQNS 112 19499 B45: PRSTPSLTKAVLLVRKFQNS 113 7487 B46: PRSTPSLTKAVLLVRKFQNS 114 7685 B47: PRSTPSTTKAVLLVRKFQNS 115 8566

These data indicate that the sequence VLLV (SEQ ID NO:116) is a critical binding region within domain II, that domain II is preferably flanked on the amino-terminus by an amino acid sequence R¹¹—X—, wherein R¹¹ is a synthetic or naturally-occurring amino acid residue that is neutral or acidic under physiological conditions and X is any amino acid residue. More preferably, the sequence includes LTTR¹¹XVLLV (SEQ ID NO:117), wherein X can optionally be alaninyl. Additionally, these data indicate that the sequence VLLV (SEQ ID NO:116) is preferably flanked on the carboxyl-terminus by a pharmaceutically acceptable substituent equivalent in size to 1 to 3 amino acid residues, or more preferably, by 4 to 6 amino acid residues.

Example 3

This example provides data identifying the critical binding regions of domain III, as well as which residues within the critical binding domain are essential and/or important in the binding of human IL-6 ligand to IL-6 receptor within domain III.

Peptide Identifier Peptide Sequence SEQ ID NO: Counts/mininute bound  C1: SSFYRLRFELRYRAERSKTFT 118 14571  C2: SSFYRLRFELRYRAERSKTF 119 13763  C3: SSFYRLRFELRYRAERSKT 120 8210  C4: SSFYRLRFELRYRAERSK 121 7619  C5: SSFYRLRFELRYRAERS 122 4707  C6: SSFYRLRFELRYPAER 123 2653  C7: SSEYRLRFELRYRAE 124 1821  C8: SSFYRLRFELRYRA 125 2509  C9: SSFYRLRFELRYR 126 2173 C10: SSFYRLRFELRY 127 1354 C11: SSFYRLRFELR 128 1127 C12: SSEYRLRFEL 129 1031 C13: SSFYRLRFE 130 1019 C14: SSFYRLRF 131 952 C15: SSFYRLR 132 991 C16: SSFYRL 133 865 C17: SSFYRLRFELRYRAERSKTFT 118 15127 C18:  SFYRLREELRYRAERSKTFT 134 12750 C19:   FYRLRFELRYRAERSKTFT 135 10136 C20:    YRLRFELRYRAERSKTFT 136 7574 C21:     RLRFELRYRAERSKTFT 137 5991 C22:      LRFELRYRAERSKTFT 138 9610 C23:       RFELRYRAERSKTFT 139 5307 C24:        FELRYRAERSKTFT 140 5113 C25:         ELRYRAERSKTFT 141 2204 C26:          LRYRAERSKTFT 142 6382 C27:           RYRAERSKTFT 143 3150 C28:            YRAERSKTFT 144 2401 C29:             RAERSKTFT 145 1432 C30:              AERSKTFT 146 1202 C31:               ERSKTFT 147 1033 C32:                RSKTFT 148 1345 C33: SSFYRLRFELRYRAERSKTFT 118 14610 C34: SSFYRLRFELRYRAERSKTF 149 16952 C35: SSFYRLRFELRYRAERSKTT 150 14809 C36: SSFYRLRFELRYRAERSKFT 151 15011 C37: SSFYRLRFELRYRAERSTFT 152 7223 C38: SSFYRLRFELRYRAERKTFT 153 12308 C39: SSFYRLRFELRYRAESKTFT 154 3430 C40: SSFYRLRFELRYRARSKTFT 155 17299 C41: SSFYRLRFELRY 156 6743 C42: SSFYRLRFELRRAERSKTFT 157 17461 C43: SSFYRLRFELYRAERSKTFT 158 7548 C44: SSFYRLRFERYRAERSKTFT 159 14120 C45: SSFYRLRFLRYRAERSKTFT 160 26802 C46: SSFYRLRELRYRAERSKTFT 161 13395 C47: SSFYRLFELRYRAERSKTFT 162 9762

These data indicate that the sequence LRYRAERS (SEQ ID NO:163)is a critical binding region within domain III, that domain III is preferably flanked on the amino-terminus by an amino acid residue R²¹, wherein R²¹ is a synthetic or naturally-occurring amino acid residue that has a side-chain that is neutral or basic under physiological conditions. Additionally, these data show that any of the amino acid residues of the critical binding domain can be replaced, preferably by a conservative substitution, and that the argininyl residues of the critical binding region are most important to the binding of the peptide. Moreover, while not meaning to be bound by any particular theory, it is apparent that this region of the protein exists in a pleated-sheet motif. Accordingly, substitutions of amino acid residues by structure-breaking amino acid residues, e.g., prolinyl, is less preferred.

Example 4

This example provides data identifying the critical binding regions of domain IV, as well as which residues within the critical binding domain are essential and/or important in the binding of human IL-6 ligand to IL-6 receptor within domain IV. In the following tabulation of data, rows D1-D10 were examined in one experiment, and rows D11-57 were examined in a separate experiment. Thus, the numerical data obtained from rows D1-10 should not be directly compared to the numerical data from rows D11-57.

Peptide Identifier Peptide Sequence SEQ ID NO: Counts/minute bound  D1: ATSLPVQDSSSVPLPTFLVAG 164 3995  D2: VQDSSSVPLPTFLVAGGSLAF 165 4521  D3: SVPLPTFLVAGGSLAFGTLLC 166 19756  D4: TFLVAGGSLAFGTLLCIAIVL 167 32022  D5: GGSLAFGTLLCIAIVLRFKKT 168 159174  D6: FGTLLCIAIVLRFKKTWKLRA 169 143540  D7: CIAIVLRFKKTWKLRALKEGK 170 52538  D8: LRFKKTWKLRALKEGKTSMHP 171 20399  D9: TWKLRALKEGKTSMHPPYSLG 172 5530 D10: ALKEGKTSMHPPYSLGQLVPE 173 4969 D11: GGSLAFGTLLCIAIVLRFKKT 168 20349 D12: GGSLAFGTLLCIAIVLRFKK 174 18081 D13: GGSLAFGTLLCIAIVLRFK 175 16082 D14: GGSLAFGTLLCIAIVLRF 176 7694 D15: GGSLAFGTLLCIAIVLR 177 3948 D16: GGSLAFGTLLCIAIVL 178 2456 D17: GGSLAFGTLLCIAIV 179 1344 D18: GGSLAFGTLLCIAI 180 1175 D19: GGSLAFGTLLCIA 181 1153 D20: GGSLAFGTLLCI 182 1202 D21: GGSLAFGTLLC 183 1108 D22: GGSLAFGTLL 184 1001 D23: GGSLAFGTL 185 997 D24: GGSLAFGT 186 981 D25: GGSLAFG 187 952 D26: GGSLAF 188 1047 D27: GGSLAFGTLLCIAIVLRFKKT 168 21945 D28:  GSLAFGTLLCIAIVLRFKKT 189 26441 D29:   SLAFGTLLCIAIVLRFKKT 190 24724 D30:    LAFGTLLCIAIVLRFKKT 191 22737 D31:     AFGTLLCIAIVLRFKKT 192 24047 D32:      FGTLLCIAIVLRFKKT 193 21799 D33:       GTLLCIAIVLRFKKT 194 15730 D34:        TLLCIAIVLRFKKT 195 12412 D35:         LLCIAIVLRFKKT 196 15510 D36:          LCIAIVLRFKKT 197 12422 D37:           CIAIVLRFKKT 198 8352 D38:            IAIVLRFKKT 199 6800 D39:             AIVLRFKKT 200 4879 D40:              IVLRFKKT 201 4452 D41:               VLRFKKT 202 2551 D42:                LRFKKT 203 1958 D43: GGSLAFGTLLCIAIVLRFKKT 168 20385 D44: GGSLAFGTLLCIAIVLRFKK 204 21366 D45: GGSLAFGTLLCIAIVLRFKT 205 28625 D46: GGSLAFGTLLCIAIVLRFKT 206 30792 D47: GGSLAFGTLLCIAIVLRKKT 207 20934 D48: GGSLAFGTLLCIAIVLFKKT 208 29450 D49: GGSLAFGTLLCIAIVRFKKT 209 22065 D50: GGSLAFGTLLCIAILRFKKT 210 17857 D51: GGSLAFGTLLVLRFKKT 211 28461 D52: GGSLAFGTLLCAIVLRFKKT 212 27699 D53: GGSLAFGTLLIAIVLRFKKT 213 34879 D54: GGSLAFGTLCIAIVLRFKKT 214 22037 D55: GGSLAFGTLCIAIVLRFKKT 215 22123 D56: GGSLAFGLLCIAIVLRFKKT 216 22973 D57: GGSLAFTLLCIAIVLRFKKT 217 22324

These data indicate that the sequence IAIVLRF (SEQ ID NO:218) is a critical binding region within domain IV, that this critical binding domain is preferably flanked on the carboxyl-terminus by one or two lysinyl residues, or at least a pharmaceutically acceptable substituent comparable in size to one to three amino acid residues, which are —KKT in the sequence of the human IL-6 receptor. These data also show that the sequence is preferably flanked on the amino-terminus by a pharmaceutically acceptable substituent comparable in size to one, two, three, four, five, or six or more amino acid residues. Of course, the pharmaceutically acceptable substituents could be synthetic or naturally-occurring amino acid residues. Moreover, the data show that any one of the amino acid residues can be replaced by an alaninyl residue, resulting in an increase in affinity for IL-6. One skilled in the art will also appreciate that multiple (e.g., two or three) substitutions can be made in the critical binding region, and that when multiple replacements or substitutions are made, then the substitutions are preferably conservatively selected. Additionally, the skilled artisan will note that the critical amino acid sequence IAIVLRF (SEQ ID NO:218) resides in an extended region that has high affinity for the IL-6 ligand and that four of the seven amino acid residues of this critical region can be found at either the amino- or carboxyl terminus of a polypeptide comprising the sequence.

Example 5

This example employs essentially the same techniques as Examples 1-4 except that fragments of the β-chain of the IL-6 receptor are used. As is known in the art, the β-chain is shared by multiple receptors. Thus, the identified fragments here are effective inhibitors of a multiplicity of binding reactions in addition to the IL-6 ligand:IL-6 receptor interaction.

Counts/ Peptide SEQ minute Identifier Peptide Sequence ID NO: bound E1: MLTLQTWVVQALFIFLTTESTGEL 219 3365 E2: ALFIFLTTESTGELLDPCGYISPE 220 1531 E3: TGELLDPCGYISPESPVVQLHSNF 221 1300 E4: ISPESPVVQLHSNFTAVCVLKEKC 222 1499 E5: HSNFTAVCVLKEKCMDYFHVNANY 223 1292 E6: KEKCMDYFHVNANYIVWKTNHFTI 224 1443 E7: NANYIVWKTNHFTIPKEQYTIINR 225 1327 E8: HFTIPKEQYTIINRTASSVTFTDI 226 1143 E9: IINRTASSVTFTDIASLNIQLTCN 227 1628 E10: FTDIASLNIQLTCNILTFGQLEQN 228 3376 E11: LTCNILTFGQLEQNVYGITIISGL 229 1816 E12: LEQNVYGITIISGLPPEKPKNLSC 230 1669 E13: ISGLPPEKPKNLSCIVNEGKKMRC 231 1202 E14: NLSCIVNEGKKMRCEWDGGRETHL 232 1171 E15: KMRCEWDGGRETHLETNFTLKSEW 233 1573 E16: ETHLETNFTLKSEWATHKFADCKA 234 1035 E17: KSEWATHKFADCKAKRDTPTSCTV 235 1409 E18: DCKAKRDTPTSCTVDYSTVYFVNI 236 1548 E19: SCTVDYSTVYFVNIEVWVEAENAL 237 3317 E20: FVNIEVWVEAENALGKVTSDHINF 238 1413 E21: ENALGKVTSDHINFDPVYKVKPNP 239 1122 E22: HINFDPVYKVKPNPPHNLSVINSE 240 1728 E23: KPNPPHNLSVINSEELSSILKLTW 241 1414 E24: INSEELSSILKLTWTNPSIKSVII 242 1007 E25: KLTWTNPSIKSVIILKYNIQYRTK 243 10331 E26: SVIILKYNIQYRTKDASTWSQIPP 244 2832 E27: YRTKDASTWSQIPPEDTASTRSSF 245 1162 E28: QIPPEDTASTRSSFTVQDLKPFTE 246 1202 E29: RSSFTVQDLKPFTEYVFRIRCMKE 247 1318 E30: PFTEYVFRIRCMKEDGKGYWSDWS 248 1263 E31: CMKEDGKGYWSDWSEEASGITYED 249 1732 E32: SDWSEEASGITYEDRPSKAPSFWY 250 1161 E33: TYEDRPSKAPSFWYKIDPSHTQGY 251 1215 E34: SFWYKIDPSHTQGYRTVQLVWKTL 252 1145 E35: TQGYRTVQLVWKTLPPFEANGKIL 253 1169 E36: WKTLPPFEANGKILDYEVTLTRWK 254 1465 E37: GKILDYEVTLTRWKSHLQNYTVNA 255 1791 E38: TRWKSHLQNYTVNATKLTVNLTND 256 3652 E39: TVNATKLTVNLTNDRYLATLTVRN 257 4360 E40: LTNDRYLATLTVRNLVGKSDAAVL 258 4802 E41: TVRNLVGKSDAAVLTIPACDFQAT 259 1104 E42: AAVLTIPACDFQATHPVMDLKAFP 260 1121 E43: FQATHPVMDLKAFPKDNMLWVEWT 261 1299 E44: KAFPKDNMLWVEWTTPRESVKKYI 262 1175 E45: VEWTTPRESVKKYILEWCVLSDKA 263 1389 E46: KKYILEWCVLSDKAPCITDWQQED 264 1712 E47: SDKAPCITDWQQEDGTVHRTYLRG 265 2079 E48: QQEDGTVHRTYLRGNLAESKCYLI 266 1082 E49: YLRGNLAESKCYLITVTPVYADGP 267 1541 E50: CYLITVTPVYADGPGSPESIKAYL 268 1259 E51: ADGPGSPESIKAYLKQAPPSKGPT 269 1194 E52: KAYLKQAPPSKGPTVRTKKVGKNE 270 1816 E53: KGPTVRTKKVGKNEAVLEWDQLPV 271 1636 E54: GKNEAVLEWDQLPVDVQNGFIRNY 272 1307 E55: QLPVDVQNGFIRNYTIFYRTIIGN 274 4355 E56: IRNYTIFYRTIIGNETAVNVDSSH 275 1635 E57: IIGNETAVNVDSSHTEYTLSSLTS 276 1232 E58: DSSHTEYTLSSLTSDTLYMVRMAA 277 1353 E59: SLTSDTLYMVRMAAYTDEGGKDGP 278 1270 E60: RMAAYTDEGGKDGPEFTFTTPKFA 279 1447 E61: KDGPEFTFTTPKFAQGEIEAIVVP 280 1393 E62: PKFAQGEIEAIVVPVCLAFLLTTL 281 2794 E63: IVVPVCLAFLLTTLLGVLFCFNKR 282 4519 E64: LTTLLGVLFCFNKRDLIKKHIWPN 283 4501 E65: FNKRDLIKKHIWPNVPDPSKSHIA 284 5741 E66: IWPNVPDPSKSHIAQWSPHTPPRH 285 1203 E67: SHIAQWSPHTPPRHNFNSKDQMYS 286 1199 E68: PPRHNFNSKDQMYSDGNFTDVSVV 287 1231 E69: QMYSDGNFTDVSVVEIEANDKKPF 288 1194 E70: VSVVEIEANDKKPFPEDLKSLDLF 289 1305 E71: KKPFPEDLKSLDLFKKEKINTEGH 290 2694 E72: LDLFKKEKINTEGHSSGIGGSSCM 291 1443 E73: TEGHSSGIGGSSCMSSSRPSISSS 292 1060 E74: SSCMSSSRPSISSSDENESSQNTS 293 1131 E75: ISSSDENESSQNTSSTVQYSTVVH 294 1118 E76: QNTSSTVQYSTVVHSGYRHQVPSV 295 1197 E77: TVVHSGYRHQVPSVQVFSRSESTQ 296 1247 E78: VPSVQVFSRSESTQPLLDSEERPE 297 1229 E79: ESTQPLLDSEERPEDLQLVDHVDG 298 1384 E80: ERPEDLQLVDHVDGGDGILPRQQY 299 1214 E81: HVDGGDGILPRQQYFKQNCSQHES 300 1097 E82: RQQYFKQNCSQHESSPDISHFERS 301 1087 E83: QHESSPDISHFERSKQVSSVNEED 301 1250 E84: FERSKQVSSVNEEDFVRLKQQISD 302 1015 E85: NEEDFVRLKQQISDHISQSCGSGQ 303 1113 E86: QISDHISQSCGSGQMKMFQEVSAA 304 1239 E87: GSGQMKMFQEVSAADAFGPGTEGQ 305 1001 E88: VSAADAFGPGTEGQVERFETVGME 306 1091 E89: TEGQVERFETVGMEAATDEGMPKS 307 1131 E90: VGMEAATDEGMPKSYLPQTVRQGG 308 1385 E91: MPKSYLPQTVRQGGYMPQ 309 1226

These data demonstrate that the sequence SVIILKYNIQY (SEQ ID NO:6) is sufficient to bind to IL-6 ligand; however, better binding can be obtained by a sequence comprising the sequence PSIKSVIILKYNIQY (SEQ ID NO:14) and the sequence can optionally comprise either WTNPSIKSVIILKYNIQY (SEQ ID NO:15) or even KLTWTNPSIKSVIILKYNIQY (SEQ ID NO:16).

These data also indicate that the sequence TRWKSHLQNYTVNATKLTVNLTNDRYLATLTVRNLVGKSDAAVL (SEQ ID NO:7) comprises a multiplicity of subsequences, each of which can bind with IL-6 ligand. Similarly, QLPVDVQNGFIRNYTIFYRTIIGN (SEQ ID NO:8) comprises a multiplicity of subsequences, each of which can bind with IL-6 ligand. Additionally, the sequence IVVPVCLAFLLTTLLGVLFCFNKRDLIKKHIWPNVPDPSKSHIA (SEQ ID NO:9)comprises a multiplicity of subsequences, each of which can bind with IL-6 ligand.

For example, one skilled in the art will appreciate that any segment of the foregoing sequences comprising about six, twelve, eighteen, or twenty-four amino acid residues is expected to bind with IL-6 ligand. Moreover, these data indicate to the skilled artisan that a multiplicity of amino acid substitutions, particularly conservative amino acid substitutions, within any of the above-described polypeptides can yield additional polypeptides having a substantial ability to bind with IL-6 ligand and to inhibit the binding of IL-6 ligand to IL-6 receptor and thereby inhibit IL-6 signaling under physiological conditions.

All publications cited herein are hereby incorporated by reference to the same extent as if each publication were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein.

While this invention has been described with an emphasis upon preferred embodiments, it will be obvious to those of ordinary skill in the art that variations of the preferred polypeptides, nucleic acids, compositions and methods, and the like can be used and that it is intended that the invention can be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the invention as defined by the following claims.

309 1 6 PRT Artificial Sequence Description of Artificial Sequence synthetic 1 Xaa Xaa Xaa Xaa Xaa Xaa 1 5 2 6 PRT Artificial Sequence Description of Artificial Sequence synthetic 2 Xaa Xaa Xaa Xaa Xaa Xaa 1 5 3 5 PRT Artificial Sequence Description of Artificial Sequence synthetic 3 Xaa Val Xaa Xaa Val 1 5 4 8 PRT Artificial Sequence Description of Artificial Sequence synthetic 4 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5 5 7 PRT Artificial Sequence Description of Artificial Sequence synthetic 5 Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5 6 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 6 Ser Val Ile Ile Leu Lys Tyr Asn Ile Gln Tyr 1 5 10 7 44 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 7 Thr Arg Trp Lys Ser His Leu Gln Asn Tyr Thr Val Asn Ala Thr Lys 1 5 10 15 Leu Thr Val Asn Leu Thr Asn Asp Arg Tyr Leu Ala Thr Leu Thr Val 20 25 30 Arg Asn Leu Val Gly Lys Ser Asp Ala Ala Val Leu 35 40 8 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 8 Gln Leu Pro Val Asp Val Gln Asn Gly Phe Ile Arg Asn Tyr Thr Ile 1 5 10 15 Phe Tyr Arg Thr Ile Ile Gly Asn 20 9 44 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 9 Ile Val Val Pro Val Cys Leu Ala Phe Leu Leu Thr Thr Leu Leu Gly 1 5 10 15 Val Leu Phe Cys Phe Asn Lys Arg Asp Leu Ile Lys Lys His Ile Trp 20 25 30 Pro Asn Val Pro Asp Pro Ser Lys Ser His Ile Ala 35 40 10 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 10 Arg Arg Leu Leu Leu Arg 1 5 11 6 PRT Artificial Sequence Description of Artificial Sequence synthetic 11 Arg Xaa Val Leu Leu Val 1 5 12 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 12 Leu Arg Tyr Arg Ala Glu Arg Ser 1 5 13 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 13 Ile Ala Ile Val Leu Arg Phe 1 5 14 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 14 Pro Ser Ile Lys Ser Val Ile Ile Leu Lys Tyr Asn Ile Gln Tyr 1 5 10 15 15 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 15 Trp Thr Asn Pro Ser Ile Lys Ser Val Ile Ile Leu Lys Tyr Asn Ile 1 5 10 15 Gln Tyr 16 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 16 Lys Leu Thr Trp Thr Asn Pro Ser Ile Lys Ser Val Ile Ile Leu Lys 1 5 10 15 Tyr Asn Ile Gln Tyr 20 17 6 PRT Artificial Sequence Description of Artificial Sequence synthetic 17 Xaa Xaa Xaa Xaa Xaa Xaa 1 5 18 4 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 18 Val Leu Leu Val 1 19 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 19 Thr Lys Ala Val Leu Leu Val Arg Phe 1 5 20 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 20 Leu Arg Ala Glu Arg Ser 1 5 21 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 21 Phe Glu Leu Arg Ala Glu Arg Ser Lys Thr 1 5 10 22 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 22 Ile Ala Ile Val Leu Arg Phe 1 5 23 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 23 Ile Ala Ile Val Leu Arg Phe Lys 1 5 24 10 PRT Artificial Sequence Description of Artificial Sequence Synthetic 24 Ile Ala Ile Val Leu Arg Phe Lys Xaa Xaa 1 5 10 25 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 25 Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys 1 5 10 26 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 26 Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 15 27 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 27 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 28 20 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 28 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser 20 29 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 29 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg 30 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 30 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu 31 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 31 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu 32 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 32 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 33 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 33 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg 1 5 10 15 34 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 34 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg 1 5 10 35 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 35 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly 1 5 10 36 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 36 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met 1 5 10 37 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 37 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly 1 5 10 38 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 38 Ala Ala Gly Ser His Pro Ser Arg Trp Ala 1 5 10 39 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 39 Ala Ala Gly Ser His Pro Ser Arg Trp 1 5 40 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 40 Ala Ala Gly Ser His Pro Ser Arg 1 5 41 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 41 Ala Ala Gly Ser His Pro Ser 1 5 42 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 42 Ala Ala Gly Ser His Pro 1 5 43 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 43 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 44 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 44 Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu Leu Leu 1 5 10 15 Arg Ser Val 45 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 45 Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu Leu Leu Arg 1 5 10 15 Ser Val 46 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 46 His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu Leu Leu Arg Ser 1 5 10 15 Val 47 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 47 Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 10 15 48 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 48 Ser Arg Trp Ala Gly Met Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 10 15 49 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 49 Arg Trp Ala Gly Met Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 10 50 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 50 Trp Ala Gly Met Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 10 51 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 51 Ala Gly Met Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 10 52 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 52 Gly Met Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 10 53 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 53 Met Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 10 54 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 54 Gly Arg Arg Leu Leu Leu Arg Ser Val 1 5 55 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 55 Arg Arg Leu Leu Leu Arg Ser Val 1 5 56 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 56 Arg Leu Leu Leu Arg Ser Val 1 5 57 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 57 Leu Leu Leu Arg Ser Val 1 5 58 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 58 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Ala 20 59 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 59 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ala Val 20 60 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 60 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Ala Ser Val 20 61 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 61 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Ala Arg Ser Val 20 62 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 62 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Ala Leu Arg Ser Val 20 63 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 63 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Arg Ala 1 5 10 15 Leu Leu Arg Ser Val 20 64 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 64 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Arg Ala Leu 1 5 10 15 Leu Leu Arg Ser Val 20 65 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 65 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Gly Ala Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 66 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 66 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Met Ala Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 67 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 67 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Gly Ala Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 68 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 68 Ala Ala Gly Ser His Pro Ser Arg Trp Ala Ala Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 69 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 69 Ala Ala Gly Ser His Pro Ser Arg Ala Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 70 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 70 Ala Ala Gly Ser His Pro Ser Ala Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 71 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 71 Ala Ala Gly Ser His Pro Ala Arg Trp Ala Gly Met Gly Arg Arg Leu 1 5 10 15 Leu Leu Arg Ser Val 20 72 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 72 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 73 20 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 73 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn 20 74 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 74 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln 75 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 75 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe 76 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 76 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys 77 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 77 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 78 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 78 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val 1 5 10 15 79 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 79 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu 1 5 10 80 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 80 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu 1 5 10 81 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 81 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val 1 5 10 82 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 82 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala 1 5 10 83 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 83 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys 1 5 10 84 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 84 Pro Arg Ser Thr Pro Ser Leu Thr Thr 1 5 85 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 85 Pro Arg Ser Thr Pro Ser Leu Thr 1 5 86 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 86 Pro Arg Ser Thr Pro Ser Leu 1 5 87 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 87 Pro Arg Ser Thr Pro Ser 1 5 88 20 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 88 Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg Lys 1 5 10 15 Phe Gln Asn Ser 20 89 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 89 Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg Lys Phe 1 5 10 15 Gln Asn Ser 90 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 90 Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg Lys Phe Gln 1 5 10 15 Asn Ser 91 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 91 Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg Lys Phe Gln Asn 1 5 10 15 Ser 92 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 92 Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 10 15 93 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 93 Leu Thr Thr Lys Ala Val Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 10 15 94 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 94 Thr Thr Lys Ala Val Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 10 95 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 95 Thr Lys Ala Val Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 10 96 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 96 Lys Ala Val Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 10 97 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 97 Ala Val Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 10 98 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 98 Val Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 10 99 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 99 Leu Leu Val Arg Lys Phe Gln Asn Ser 1 5 100 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 100 Leu Val Arg Lys Phe Gln Asn Ser 1 5 101 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 101 Val Arg Lys Phe Gln Asn Ser 1 5 102 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 102 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ala 20 103 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 103 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Ala Ser 20 104 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 104 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Ala Asn Ser 20 105 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 105 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Ala Gln Asn Ser 20 106 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 106 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Ala Phe Gln Asn Ser 20 107 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 107 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Val Ala 1 5 10 15 Lys Phe Gln Asn Ser 20 108 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 108 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Leu Ala Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 109 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 109 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Leu Ala Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 110 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 110 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Val Ala Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 111 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 111 Pro Arg Ser Thr Pro Ser Leu Thr Thr Lys Ala Ala Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 112 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 112 Pro Arg Ser Thr Pro Ser Leu Thr Thr Ala Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 113 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 113 Pro Arg Ser Thr Pro Ser Leu Thr Ala Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 114 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 114 Pro Arg Ser Thr Pro Ser Leu Ala Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 115 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 115 Pro Arg Ser Thr Pro Ser Ala Thr Thr Lys Ala Val Leu Leu Val Arg 1 5 10 15 Lys Phe Gln Asn Ser 20 116 4 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 116 Val Leu Leu Val 1 117 9 PRT Artificial Sequence Description of Artificial Sequence Synthetic 117 Leu Thr Thr Arg Xaa Val Leu Leu Val 1 5 118 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 118 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 119 20 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 119 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe 20 120 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 120 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr 121 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 121 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys 122 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 122 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser 123 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 123 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 124 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 124 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu 1 5 10 15 125 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 125 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala 1 5 10 126 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 126 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg 1 5 10 127 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 127 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr 1 5 10 128 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 128 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg 1 5 10 129 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 129 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu 1 5 10 130 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 130 Ser Ser Phe Tyr Arg Leu Arg Phe Glu 1 5 131 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 131 Ser Ser Phe Tyr Arg Leu Arg Phe 1 5 132 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 132 Ser Ser Phe Tyr Arg Leu Arg 1 5 133 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 133 Ser Ser Phe Tyr Arg Leu 1 5 134 20 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 134 Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg Ser 1 5 10 15 Lys Thr Phe Thr 20 135 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 135 Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg Ser Lys 1 5 10 15 Thr Phe Thr 136 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 136 Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg Ser Lys Thr 1 5 10 15 Phe Thr 137 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 137 Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg Ser Lys Thr Phe 1 5 10 15 Thr 138 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 138 Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 10 15 139 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 139 Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 10 15 140 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 140 Phe Glu Leu Arg Tyr Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 10 141 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 141 Glu Leu Arg Tyr Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 10 142 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 142 Leu Arg Tyr Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 10 143 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 143 Arg Tyr Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 10 144 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 144 Tyr Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 10 145 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 145 Arg Ala Glu Arg Ser Lys Thr Phe Thr 1 5 146 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 146 Ala Glu Arg Ser Lys Thr Phe Thr 1 5 147 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 147 Glu Arg Ser Lys Thr Phe Thr 1 5 148 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 148 Arg Ser Lys Thr Phe Thr 1 5 149 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 149 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Ala 20 150 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 150 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Ala Thr 20 151 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 151 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Ala Phe Thr 20 152 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 152 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Ala Thr Phe Thr 20 153 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 153 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ala Lys Thr Phe Thr 20 154 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 154 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Glu Ala 1 5 10 15 Ser Lys Thr Phe Thr 20 155 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 155 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Arg Ala Ala Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 156 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 156 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Tyr Ala Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 157 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 157 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Arg Ala Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 158 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 158 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Leu Ala Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 159 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 159 Ser Ser Phe Tyr Arg Leu Arg Phe Glu Ala Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 160 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 160 Ser Ser Phe Tyr Arg Leu Arg Phe Ala Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 161 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 161 Ser Ser Phe Tyr Arg Leu Arg Ala Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 162 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 162 Ser Ser Phe Tyr Arg Leu Ala Phe Glu Leu Arg Tyr Arg Ala Glu Arg 1 5 10 15 Ser Lys Thr Phe Thr 20 163 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 163 Leu Arg Tyr Arg Ala Glu Arg Ser 1 5 164 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 164 Ala Thr Ser Leu Pro Val Gln Asp Ser Ser Ser Val Pro Leu Pro Thr 1 5 10 15 Phe Leu Val Ala Gly 20 165 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 165 Val Gln Asp Ser Ser Ser Val Pro Leu Pro Thr Phe Leu Val Ala Gly 1 5 10 15 Gly Ser Leu Ala Phe 20 166 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 166 Ser Val Pro Leu Pro Thr Phe Leu Val Ala Gly Gly Ser Leu Ala Phe 1 5 10 15 Gly Thr Leu Leu Cys 20 167 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 167 Thr Phe Leu Val Ala Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys 1 5 10 15 Ile Ala Ile Val Leu 20 168 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 168 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 169 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 169 Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 15 Trp Lys Leu Arg Ala 20 170 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 170 Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr Trp Lys Leu Arg Ala 1 5 10 15 Leu Lys Glu Gly Lys 20 171 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 171 Leu Arg Phe Lys Lys Thr Trp Lys Leu Arg Ala Leu Lys Glu Gly Lys 1 5 10 15 Thr Ser Met His Pro 20 172 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 172 Thr Trp Lys Leu Arg Ala Leu Lys Glu Gly Lys Thr Ser Met His Pro 1 5 10 15 Pro Tyr Ser Leu Gly 20 173 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 173 Ala Leu Lys Glu Gly Lys Thr Ser Met His Pro Pro Tyr Ser Leu Gly 1 5 10 15 Gln Leu Val Pro Glu 20 174 20 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 174 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys 20 175 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 175 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys 176 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 176 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe 177 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 177 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg 178 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 178 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 179 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 179 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val 1 5 10 15 180 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 180 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile 1 5 10 181 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 181 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala 1 5 10 182 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 182 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile 1 5 10 183 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 183 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys 1 5 10 184 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 184 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu 1 5 10 185 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 185 Gly Gly Ser Leu Ala Phe Gly Thr Leu 1 5 186 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 186 Gly Gly Ser Leu Ala Phe Gly Thr 1 5 187 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 187 Gly Gly Ser Leu Ala Phe Gly 1 5 188 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 188 Gly Gly Ser Leu Ala Phe 1 5 189 20 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 189 Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg 1 5 10 15 Phe Lys Lys Thr 20 190 19 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 190 Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe 1 5 10 15 Lys Lys Thr 191 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 191 Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys 1 5 10 15 Lys Thr 192 17 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 192 Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys 1 5 10 15 Thr 193 16 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 193 Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 15 194 15 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 194 Gly Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 15 195 14 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 195 Thr Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 196 13 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 196 Leu Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 197 12 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 197 Leu Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 198 11 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 198 Cys Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 199 10 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 199 Ile Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 10 200 9 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 200 Ala Ile Val Leu Arg Phe Lys Lys Thr 1 5 201 8 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 201 Ile Val Leu Arg Phe Lys Lys Thr 5 202 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 202 Val Leu Arg Phe Lys Lys Thr 5 203 6 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 203 Leu Arg Phe Lys Lys Thr 1 5 204 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 204 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Ala 20 205 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 205 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Ala Thr 20 206 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 206 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Ala Lys Thr 20 207 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 207 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Ala Lys Lys Thr 20 208 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 208 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Ala Phe Lys Lys Thr 20 209 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 209 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Val Ala 1 5 10 15 Arg Phe Lys Lys Thr 20 210 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 210 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ile Ala Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 211 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 211 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ile Ala Ala Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 212 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 212 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Cys Ala Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 213 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 213 Gly Gly Ser Leu Ala Phe Gly Thr Leu Leu Ala Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 214 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 214 Gly Gly Ser Leu Ala Phe Gly Thr Leu Ala Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 215 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 215 Gly Gly Ser Leu Ala Phe Gly Thr Ala Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 216 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 216 Gly Gly Ser Leu Ala Phe Gly Ala Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 217 21 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 217 Gly Gly Ser Leu Ala Phe Ala Thr Leu Leu Cys Ile Ala Ile Val Leu 1 5 10 15 Arg Phe Lys Lys Thr 20 218 7 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 218 Ile Ala Ile Val Leu Arg Phe 1 5 219 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 219 Met Leu Thr Leu Gln Thr Trp Val Val Gln Ala Leu Phe Ile Phe Leu 1 5 10 15 Thr Thr Glu Ser Thr Gly Glu Leu 20 220 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 220 Ala Leu Phe Ile Phe Leu Thr Thr Glu Ser Thr Gly Glu Leu Leu Asp 1 5 10 15 Pro Cys Gly Tyr Ile Ser Pro Glu 20 221 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 221 Thr Gly Glu Leu Leu Asp Pro Cys Gly Tyr Ile Ser Pro Glu Ser Pro 1 5 10 15 Val Val Gln Leu His Ser Asn Phe 20 222 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 222 Ile Ser Pro Glu Ser Pro Val Val Gln Leu His Ser Asn Phe Thr Ala 1 5 10 15 Val Cys Val Leu Lys Glu Lys Cys 20 223 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 223 His Ser Asn Phe Thr Ala Val Cys Val Leu Lys Glu Lys Cys Met Asp 1 5 10 15 Tyr Phe His Val Asn Ala Asn Tyr 20 224 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 224 Lys Glu Lys Cys Met Asp Tyr Phe His Val Asn Ala Asn Tyr Ile Val 1 5 10 15 Trp Lys Thr Asn His Phe Thr Ile 20 225 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 225 Asn Ala Asn Tyr Ile Val Trp Lys Thr Asn His Phe Thr Ile Pro Lys 1 5 10 15 Glu Gln Tyr Thr Ile Ile Asn Arg 20 226 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 226 His Phe Thr Ile Pro Lys Glu Gln Tyr Thr Ile Ile Asn Arg Thr Ala 1 5 10 15 Ser Ser Val Thr Phe Thr Asp Ile 20 227 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 227 Ile Ile Asn Arg Thr Ala Ser Ser Val Thr Phe Thr Asp Ile Ala Ser 1 5 10 15 Leu Asn Ile Gln Leu Thr Cys Asn 20 228 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 228 Phe Thr Asp Ile Ala Ser Leu Asn Ile Gln Leu Thr Cys Asn Ile Leu 1 5 10 15 Thr Phe Gly Gln Leu Glu Gln Asn 20 229 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 229 Leu Thr Cys Asn Ile Leu Thr Phe Gly Gln Leu Glu Gln Asn Val Tyr 1 5 10 15 Gly Ile Thr Ile Ile Ser Gly Leu 20 230 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 230 Leu Glu Gln Asn Val Tyr Gly Ile Thr Ile Ile Ser Gly Leu Pro Pro 1 5 10 15 Glu Lys Pro Lys Asn Leu Ser Cys 20 231 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 231 Ile Ser Gly Leu Pro Pro Glu Lys Pro Lys Asn Leu Ser Cys Ile Val 1 5 10 15 Asn Glu Gly Lys Lys Met Arg Cys 20 232 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 232 Asn Leu Ser Cys Ile Val Asn Glu Gly Lys Lys Met Arg Cys Glu Trp 1 5 10 15 Asp Gly Gly Arg Glu Thr His Leu 20 233 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 233 Lys Met Arg Cys Glu Trp Asp Gly Gly Arg Glu Thr His Leu Glu Thr 1 5 10 15 Asn Phe Thr Leu Lys Ser Glu Trp 20 234 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 234 Glu Thr His Leu Glu Thr Asn Phe Thr Leu Lys Ser Glu Trp Ala Thr 1 5 10 15 His Lys Phe Ala Asp Cys Lys Ala 20 235 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 235 Lys Ser Glu Trp Ala Thr His Lys Phe Ala Asp Cys Lys Ala Lys Arg 1 5 10 15 Asp Thr Pro Thr Ser Cys Thr Val 20 236 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 236 Asp Cys Lys Ala Lys Arg Asp Thr Pro Thr Ser Cys Thr Val Asp Tyr 1 5 10 15 Ser Thr Val Tyr Phe Val Asn Ile 20 237 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 237 Ser Cys Thr Val Asp Tyr Ser Thr Val Tyr Phe Val Asn Ile Glu Val 1 5 10 15 Trp Val Glu Ala Glu Asn Ala Leu 20 238 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 238 Phe Val Asn Ile Glu Val Trp Val Glu Ala Glu Asn Ala Leu Gly Lys 1 5 10 15 Val Thr Ser Asp His Ile Asn Phe 20 239 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 239 Glu Asn Ala Leu Gly Lys Val Thr Ser Asp His Ile Asn Phe Asp Pro 1 5 10 15 Val Tyr Lys Val Lys Pro Asn Pro 20 240 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 240 His Ile Asn Phe Asp Pro Val Tyr Lys Val Lys Pro Asn Pro Pro His 1 5 10 15 Asn Leu Ser Val Ile Asn Ser Glu 20 241 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 241 Lys Pro Asn Pro Pro His Asn Leu Ser Val Ile Asn Ser Glu Glu Leu 1 5 10 15 Ser Ser Ile Leu Lys Leu Thr Trp 20 242 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 242 Ile Asn Ser Glu Glu Leu Ser Ser Ile Leu Lys Leu Thr Trp Thr Asn 1 5 10 15 Pro Ser Ile Lys Ser Val Ile Ile 20 243 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 243 Lys Leu Thr Trp Thr Asn Pro Ser Ile Lys Ser Val Ile Ile Leu Lys 1 5 10 15 Tyr Asn Ile Gln Tyr Arg Thr Lys 20 244 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 244 Ser Val Ile Ile Leu Lys Tyr Asn Ile Gln Tyr Arg Thr Lys Asp Ala 1 5 10 15 Ser Thr Trp Ser Gln Ile Pro Pro 20 245 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 245 Tyr Arg Thr Lys Asp Ala Ser Thr Trp Ser Gln Ile Pro Pro Glu Asp 1 5 10 15 Thr Ala Ser Thr Arg Ser Ser Phe 20 246 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 246 Gln Ile Pro Pro Glu Asp Thr Ala Ser Thr Arg Ser Ser Phe Thr Val 1 5 10 15 Gln Asp Leu Lys Pro Phe Thr Glu 20 247 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 247 Arg Ser Ser Phe Thr Val Gln Asp Leu Lys Pro Phe Thr Glu Tyr Val 1 5 10 15 Phe Arg Ile Arg Cys Met Lys Glu 20 248 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 248 Pro Phe Thr Glu Tyr Val Phe Arg Ile Arg Cys Met Lys Glu Asp Gly 1 5 10 15 Lys Gly Tyr Trp Ser Asp Trp Ser 20 249 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 249 Cys Met Lys Glu Asp Gly Lys Gly Tyr Trp Ser Asp Trp Ser Glu Glu 1 5 10 15 Ala Ser Gly Ile Thr Tyr Glu Asp 20 250 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 250 Ser Asp Trp Ser Glu Glu Ala Ser Gly Ile Thr Tyr Glu Asp Arg Pro 1 5 10 15 Ser Lys Ala Pro Ser Phe Trp Tyr 20 251 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 251 Thr Tyr Glu Asp Arg Pro Ser Lys Ala Pro Ser Phe Trp Tyr Lys Ile 1 5 10 15 Asp Pro Ser His Thr Gln Gly Tyr 20 252 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 252 Ser Phe Trp Tyr Lys Ile Asp Pro Ser His Thr Gln Gly Tyr Arg Thr 1 5 10 15 Val Gln Leu Val Trp Lys Thr Leu 20 253 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 253 Thr Gln Gly Tyr Arg Thr Val Gln Leu Val Trp Lys Thr Leu Pro Pro 1 5 10 15 Phe Glu Ala Asn Gly Lys Ile Leu 20 254 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 254 Trp Lys Thr Leu Pro Pro Phe Glu Ala Asn Gly Lys Ile Leu Asp Tyr 1 5 10 15 Glu Val Thr Leu Thr Arg Trp Lys 20 255 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 255 Gly Lys Ile Leu Asp Tyr Glu Val Thr Leu Thr Arg Trp Lys Ser His 1 5 10 15 Leu Gln Asn Tyr Thr Val Asn Ala 20 256 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 256 Thr Arg Trp Lys Ser His Leu Gln Asn Tyr Thr Val Asn Ala Thr Lys 1 5 10 15 Leu Thr Val Asn Leu Thr Asn Asp 20 257 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 257 Thr Val Asn Ala Thr Lys Leu Thr Val Asn Leu Thr Asn Asp Arg Tyr 1 5 10 15 Leu Ala Thr Leu Thr Val Arg Asn 20 258 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 258 Leu Thr Asn Asp Arg Tyr Leu Ala Thr Leu Thr Val Arg Asn Leu Val 1 5 10 15 Gly Lys Ser Asp Ala Ala Val Leu 20 259 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 259 Thr Val Arg Asn Leu Val Gly Lys Ser Asp Ala Ala Val Leu Thr Ile 1 5 10 15 Pro Ala Cys Asp Phe Gln Ala Thr 20 260 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 260 Ala Ala Val Leu Thr Ile Pro Ala Cys Asp Phe Gln Ala Thr His Pro 1 5 10 15 Val Met Asp Leu Lys Ala Phe Pro 20 261 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 261 Phe Gln Ala Thr His Pro Val Met Asp Leu Lys Ala Phe Pro Lys Asp 1 5 10 15 Asn Met Leu Trp Val Glu Trp Thr 20 262 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 262 Lys Ala Phe Pro Lys Asp Asn Met Leu Trp Val Glu Trp Thr Thr Pro 1 5 10 15 Arg Glu Ser Val Lys Lys Tyr Ile 20 263 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 263 Val Glu Trp Thr Thr Pro Arg Glu Ser Val Lys Lys Tyr Ile Leu Glu 1 5 10 15 Trp Cys Val Leu Ser Asp Lys Ala 20 264 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 264 Lys Lys Tyr Ile Leu Glu Trp Cys Val Leu Ser Asp Lys Ala Pro Cys 1 5 10 15 Ile Thr Asp Trp Gln Gln Glu Asp 20 265 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 265 Ser Asp Lys Ala Pro Cys Ile Thr Asp Trp Gln Gln Glu Asp Gly Thr 1 5 10 15 Val His Arg Thr Tyr Leu Arg Gly 20 266 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 266 Gln Gln Glu Asp Gly Thr Val His Arg Thr Tyr Leu Arg Gly Asn Leu 1 5 10 15 Ala Glu Ser Lys Cys Tyr Leu Ile 20 267 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 267 Tyr Leu Arg Gly Asn Leu Ala Glu Ser Lys Cys Tyr Leu Ile Thr Val 1 5 10 15 Thr Pro Val Tyr Ala Asp Gly Pro 20 268 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 268 Cys Tyr Leu Ile Thr Val Thr Pro Val Tyr Ala Asp Gly Pro Gly Ser 1 5 10 15 Pro Glu Ser Ile Lys Ala Tyr Leu 20 269 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 269 Ala Asp Gly Pro Gly Ser Pro Glu Ser Ile Lys Ala Tyr Leu Lys Gln 1 5 10 15 Ala Pro Pro Ser Lys Gly Pro Thr 20 270 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 270 Lys Ala Tyr Leu Lys Gln Ala Pro Pro Ser Lys Gly Pro Thr Val Arg 1 5 10 15 Thr Lys Lys Val Gly Lys Asn Glu 20 271 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 271 Lys Gly Pro Thr Val Arg Thr Lys Lys Val Gly Lys Asn Glu Ala Val 1 5 10 15 Leu Glu Trp Asp Gln Leu Pro Val 20 272 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 272 Gly Lys Asn Glu Ala Val Leu Glu Trp Asp Gln Leu Pro Val Asp Val 1 5 10 15 Gln Asn Gly Phe Ile Arg Asn Tyr 20 273 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 273 Gln Leu Pro Val Asp Val Gln Asn Gly Phe Ile Arg Asn Tyr Thr Ile 1 5 10 15 Phe Tyr Arg Thr Ile Ile Gly Asn 20 274 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 274 Ile Arg Asn Tyr Thr Ile Phe Tyr Arg Thr Ile Ile Gly Asn Glu Thr 1 5 10 15 Ala Val Asn Val Asp Ser Ser His 20 275 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 275 Ile Ile Gly Asn Glu Thr Ala Val Asn Val Asp Ser Ser His Thr Glu 1 5 10 15 Tyr Thr Leu Ser Ser Leu Thr Ser 20 276 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 276 Asp Ser Ser His Thr Glu Tyr Thr Leu Ser Ser Leu Thr Ser Asp Thr 1 5 10 15 Leu Tyr Met Val Arg Met Ala Ala 20 277 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 277 Ser Leu Thr Ser Asp Thr Leu Tyr Met Val Arg Met Ala Ala Tyr Thr 1 5 10 15 Asp Glu Gly Gly Lys Asp Gly Pro 20 278 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 278 Arg Met Ala Ala Tyr Thr Asp Glu Gly Gly Lys Asp Gly Pro Glu Phe 1 5 10 15 Thr Phe Thr Thr Pro Lys Phe Ala 20 279 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 279 Lys Asp Gly Pro Glu Phe Thr Phe Thr Thr Pro Lys Phe Ala Gln Gly 1 5 10 15 Glu Ile Glu Ala Ile Val Val Pro 20 280 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 280 Pro Lys Phe Ala Gln Gly Glu Ile Glu Ala Ile Val Val Pro Val Cys 1 5 10 15 Leu Ala Phe Leu Leu Thr Thr Leu 20 281 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 281 Ile Val Val Pro Val Cys Leu Ala Phe Leu Leu Thr Thr Leu Leu Gly 1 5 10 15 Val Leu Phe Cys Phe Asn Lys Arg 20 282 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 282 Leu Thr Thr Leu Leu Gly Val Leu Phe Cys Phe Asn Lys Arg Asp Leu 1 5 10 15 Ile Lys Lys His Ile Trp Pro Asn 20 283 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 283 Phe Asn Lys Arg Asp Leu Ile Lys Lys His Ile Trp Pro Asn Val Pro 1 5 10 15 Asp Pro Ser Lys Ser His Ile Ala 20 284 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 284 Ile Trp Pro Asn Val Pro Asp Pro Ser Lys Ser His Ile Ala Gln Trp 1 5 10 15 Ser Pro His Thr Pro Pro Arg His 20 285 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 285 Ser His Ile Ala Gln Trp Ser Pro His Thr Pro Pro Arg His Asn Phe 1 5 10 15 Asn Ser Lys Asp Gln Met Tyr Ser 20 286 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 286 Pro Pro Arg His Asn Phe Asn Ser Lys Asp Gln Met Tyr Ser Asp Gly 1 5 10 15 Asn Phe Thr Asp Val Ser Val Val 20 287 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 287 Gln Met Tyr Ser Asp Gly Asn Phe Thr Asp Val Ser Val Val Glu Ile 1 5 10 15 Glu Ala Asn Asp Lys Lys Pro Phe 20 288 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 288 Val Ser Val Val Glu Ile Glu Ala Asn Asp Lys Lys Pro Phe Pro Glu 1 5 10 15 Asp Leu Lys Ser Leu Asp Leu Phe 20 289 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 289 Lys Lys Pro Phe Pro Glu Asp Leu Lys Ser Leu Asp Leu Phe Lys Lys 1 5 10 15 Glu Lys Ile Asn Thr Glu Gly His 20 290 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 290 Leu Asp Leu Phe Lys Lys Glu Lys Ile Asn Thr Glu Gly His Ser Ser 1 5 10 15 Gly Ile Gly Gly Ser Ser Cys Met 20 291 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 291 Thr Glu Gly His Ser Ser Gly Ile Gly Gly Ser Ser Cys Met Ser Ser 1 5 10 15 Ser Arg Pro Ser Ile Ser Ser Ser 20 292 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 292 Ser Ser Cys Met Ser Ser Ser Arg Pro Ser Ile Ser Ser Ser Asp Glu 1 5 10 15 Asn Glu Ser Ser Gln Asn Thr Ser 20 293 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 293 Ile Ser Ser Ser Asp Glu Asn Glu Ser Ser Gln Asn Thr Ser Ser Thr 1 5 10 15 Val Gln Tyr Ser Thr Val Val His 20 294 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 294 Gln Asn Thr Ser Ser Thr Val Gln Tyr Ser Thr Val Val His Ser Gly 1 5 10 15 Tyr Arg His Gln Val Pro Ser Val 20 295 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 295 Thr Val Val His Ser Gly Tyr Arg His Gln Val Pro Ser Val Gln Val 1 5 10 15 Phe Ser Arg Ser Glu Ser Thr Gln 20 296 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 296 Val Pro Ser Val Gln Val Phe Ser Arg Ser Glu Ser Thr Gln Pro Leu 1 5 10 15 Leu Asp Ser Glu Glu Arg Pro Glu 20 297 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 297 Glu Ser Thr Gln Pro Leu Leu Asp Ser Glu Glu Arg Pro Glu Asp Leu 1 5 10 15 Gln Leu Val Asp His Val Asp Gly 20 298 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 298 Glu Arg Pro Glu Asp Leu Gln Leu Val Asp His Val Asp Gly Gly Asp 1 5 10 15 Gly Ile Leu Pro Arg Gln Gln Tyr 20 299 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 299 His Val Asp Gly Gly Asp Gly Ile Leu Pro Arg Gln Gln Tyr Phe Lys 1 5 10 15 Gln Asn Cys Ser Gln His Glu Ser 20 300 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 300 Arg Gln Gln Tyr Phe Lys Gln Asn Cys Ser Gln His Glu Ser Ser Pro 1 5 10 15 Asp Ile Ser His Phe Glu Arg Ser 20 301 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 301 Gln His Glu Ser Ser Pro Asp Ile Ser His Phe Glu Arg Ser Lys Gln 1 5 10 15 Val Ser Ser Val Asn Glu Glu Asp 20 302 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 302 Phe Glu Arg Ser Lys Gln Val Ser Ser Val Asn Glu Glu Asp Phe Val 1 5 10 15 Arg Leu Lys Gln Gln Ile Ser Asp 20 303 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 303 Asn Glu Glu Asp Phe Val Arg Leu Lys Gln Gln Ile Ser Asp His Ile 1 5 10 15 Ser Gln Ser Cys Gly Ser Gly Gln 20 304 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 304 Gln Ile Ser Asp His Ile Ser Gln Ser Cys Gly Ser Gly Gln Met Lys 1 5 10 15 Met Phe Gln Glu Val Ser Ala Ala 20 305 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 305 Gly Ser Gly Gln Met Lys Met Phe Gln Glu Val Ser Ala Ala Asp Ala 1 5 10 15 Phe Gly Pro Gly Thr Glu Gly Gln 20 306 24 PRT Artificial Sequence Description of Artificial Sequence Synthetic 306 Val Ser Ala Ala Asp Ala Phe Gly Pro Gly Thr Glu Gly Gln Val Glu 1 5 10 15 Arg Phe Glu Thr Val Gly Met Glu 20 307 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 307 Thr Glu Gly Gln Val Glu Arg Phe Glu Thr Val Gly Met Glu Ala Ala 1 5 10 15 Thr Asp Glu Gly Met Pro Lys Ser 20 308 24 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 308 Val Gly Met Glu Ala Ala Thr Asp Glu Gly Met Pro Lys Ser Tyr Leu 1 5 10 15 Pro Gln Thr Val Arg Gln Gly Gly 20 309 18 PRT Artificial Sequence Description of Artificial Sequence Binding peptide 309 Met Pro Lys Ser Tyr Leu Pro Gln Thr Val Arg Gln Gly Gly Tyr Met 1 5 10 15 Pro Gln 

What is claimed is:
 1. An isolated polypeptide consisting of a fragment of the IL-6 receptor, wherein said fragment comprises SEQ ID NO:23 or SEQ ID NO:25, wherein said polypeptide inhibits the binding of IL-6 ligand with the IL-6 receptor under physiological conditions and wherein said fragment is not more than 200 contiguous amino acids. 